KOBO Bumper Plates 51mm, Red 25 kg

Product Details Pack Of Two Olympic Bumper Plates (Weight 25 Kg Each x 2 = 50 Kg)Solid Large Stainless Steel Ring Gives a Perfect Fit and Long DurabilityThe precision and quality of these bumpers make it ideal for Olympic weight lifters KOBO Bumper Plates 51mm

KOBO Premium Quality Rubber Coated Olympic Plate 51mm, Black 2.5 kg

Product Details Pack Of Two Olympic Rod Plates (2.5 Kg x 2 = 5 Kg)51 mm Hole that Fits all Olympic Size RodsSolid Steel Ring Gives a Perfect Fit and Long Durability KOBO Premium Quality Rubber Coated Olympic Plate 51mm

KOBO Premium Quality Rubber Coated Plate 31mm, Black 7.5 kg

Product Details High Quality Cast Iron Used With Rubber Coated & Weight Embossed33 mm Hole that Fits all Standard Size RodsTri-Grip Handles for Easy Loading & Offloading KOBO Premium Quality Rubber Coated Plate 31mm

Fitsy Olympic Weight Plates for Gym (Pair), Red 5 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 5 kg each.FITSY Olympic Weight Plates Combo - Rubber ENCASED CAST Iron Olympic Weight Plates for Home Gym - 5 KG X2 - RED - Gym Equipment for Home Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible and can be used on Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 5 kg (11 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 9.5 inch (24.13 cm). You are considering 5 KG x 2 Red colored weight plates.

KOBO Premium Quality Rubber Coated Plate 31mm, Black 2.5 kg

Product Details High Quality Cast Iron Used With Rubber Coated & Weight Embossed31 mm Hole that Fits all Standard Size RodsTri-Grip Handles for Easy Loading & Offloading KOBO Premium Quality Rubber Coated Plate 31mm

KOBO Bumper Plates 51mm, Yellow 15 kg

Product Details Pack Of Two Olympic Bumper Plates (Weight 15 Kg Each x 2 = 30 Kg)Solid Large Stainless Steel Ring Gives a Perfect Fit and Long DurabilityThe precision and quality of these bumpers make it ideal for Olympic weight lifters KOBO Bumper Plates 51mm

KOBO Premium Quality Rubber Coated Olympic Plate 51mm, Black 7.5 kg

Product Details Pack Of Two Olympic Rod Plates (7.5 Kg x 2 = 15 Kg)51 mm Hole that Fits all Olympic Size RodsSolid Steel Ring Gives a Perfect Fit and Long Durability KOBO Premium Quality Rubber Coated Olympic Plate 51mm

KOBO Premium Quality Rubber Coated Plate 31mm, Black 5 kg

Product Details High Quality Cast Iron Used With Rubber Coated & Weight Embossed32 mm Hole that Fits all Standard Size RodsTri-Grip Handles for Easy Loading & Offloading KOBO Premium Quality Rubber Coated Plate 31mm

Fitsy Olympic Weight Plates for Home Gym (Pair), Black 2.5 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 2.5 kg each.FITSY Olympic Weight Plates - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - 2.5 kg X 2 - Black - Olympic Cast Iron Weight Plates for Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 2.5 kg (5.5 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 8 inch (20.32 cm). You are considering our Black 2.5 kg (x2) Olympic weight plates.

Fitsy Olympic Weight Plates for Gym (Pair), Black 15 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 15 kg each.FITSY Olympic Weight Plates - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - Black - Olympic Cast Iron Weight Plates for Gym ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 15 kg (33 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 14 inch (35.56 cm). You are considering our Black 15 kg (x2) Olympic weight plates.

KOBO Premium Quality Rubber Coated Olympic Plate 51mm, Black 15 kg

Product Details Pack Of Two Olympic Rod Plates (15 Kg x 2 = 30 Kg)51 mm Hole that Fits all Olympic Size RodsSolid Steel Ring Gives a Perfect Fit and Long Durability KOBO Premium Quality Rubber Coated Olympic Plate 51mm

Fitsy Olympic Weight Plates for Gym (Pair), Black 10 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 10 kg each.FITSY Olympic Weight Plates - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - Black - Olympic Cast Iron Weight Plates for Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 10 kg (22 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 12.5 inch (31.75 cm). You are considering our Black 10 kg (x2) Olympic weight plates.

Fitsy Olympic Weight Plates for Gym (Pair), Blue 2.5 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 2.5 kg each.FITSY Olympic Weight Plates Combo - Rubber ENCASED CAST Iron Olympic Weight Plates for Home Gym - 2.5 KG X 2 - Blue - Gym Equipment for Home Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible and can be used on Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 2.5 kg (5.5 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 8 inch (20.32 cm). You are considering 2.5 KG x 2 Blue colored weight plates.

KOBO Premium Quality Rubber Coated Olympic Plate 51mm, Black 10 kg

Product Details Pack Of Two Olympic Rod Plates (10 Kg x 2 = 20 Kg)51 mm Hole that Fits all Olympic Size RodsSolid Steel Ring Gives a Perfect Fit and Long Durability KOBO Premium Quality Rubber Coated Olympic Plate 51mm

KOBO Premium Quality Rubber Coated Plate 31mm, Black 15 kg

Product Details High Quality Cast Iron Used With Rubber Coated & Weight Embossed35 mm Hole that Fits all Standard Size RodsTri-Grip Handles for Easy Loading & Offloading KOBO Premium Quality Rubber Coated Plate 31mm

KOBO Bumper Plates 51mm, Green 10 kg

Product Details Pack Of Two Olympic Bumper Plates (Weight 5 Kg Each x 2 = 10 Kg)Solid Large Stainless Steel Ring Gives a Perfect Fit and Long DurabilityThe precision and quality of these bumpers make it ideal for Olympic weight lifters KOBO Bumper Plates 51mm

KOBO Bumper Plates 51mm, Black 5 kg

Product Details Pack Of Two Olympic Bumper Plates (Weight 5 Kg Each x 2 = 10 Kg)Solid Large Stainless Steel Ring Gives a Perfect Fit and Long DurabilityThe precision and quality of these bumpers make it ideal for Olympic weight lifters KOBO Bumper Plates 51mm

Fitsy Olympic Weight Plates for Gym (Pair), Black 5 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of these barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 5 kg ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 5 kg (11 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 9.5 inch (24.13 cm). & nbsp;

Fitsy Olympic Weight Plates for Gym (Pair), Green 10 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 10 kg each.FITSY Olympic Weight Plates Combo - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - 10 Kg X 2 - Green - Gym Equipment for Home Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. POCKET FRIENDLY WITH EASY STORAGE: When considering weight training in the comfort of our own homes, we tend to face the issue of weight training equipment being bulky for our home gyms not only that, but these gym equipment tend to be above our spending budget. While the rubber encased cast iron weight plates are budget friendly home gym equipment and consume lesser storage space in your home gym. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible and can be used on Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 10 kg (22 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 12.5 inch (31.75 cm). You are considering 10 KG x 2 Green colored weight plates

Fitsy Olympic Weight Plates for Gym (Pair), Black 2.5 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 2.5 kg each.FITSY Olympic Weight Plates - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - Black - Olympic Cast Iron Weight Plates for Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible with 2 inch Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 2.5 kg (5.5 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 8 inch (20.32 cm). You are considering our Black 2.5 kg (x2) Olympic weight plates.

KOBO Bumper Plates 51mm, Blue 20 kg

Product Details Pack Of Two Olympic Bumper Plates (Weight 20 Kg Each x 2 = 40 Kg)Solid Large Stainless Steel Ring Gives a Perfect Fit and Long DurabilityThe precision and quality of these bumpers make it ideal for Olympic weight lifters KOBO Bumper Plates 51mm

Fitsy Olympic Weight Plates for Gym (Pair), Yellow 15 kg

Product Details The ergonomic tri grip on FITSY’s Olympic Weight Plates give you a firmer grip on the weight platesMakes the handling of barbell weights easier while attaching them onto your home gym equipmentThe diversity of these Olympic weight plates help you tone every muscle in your body.The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection.Compatible with 2 inch Olympic barbell rods. Package Contents 2 Olympic Weight Plates - 15 kg each.FITSY Olympic Weight Plates Combo - Rubber Encased Cast Iron Olympic Weight Plates for Home Gym - 15 Kg X 2 - Yellow - Gym Equipment for Home Gym. ERGONOMIC TRI GRIP: The ergonomic tri grip on FITSY & rsquo;s Olympic Weight Plates give you a firmer and sturdier grip on the weight plates, this makes the handling of these barbell weights easier while attaching them on to your home gym equipment or hold them in your hands while exercising. VERSATILE: Weight plates work by stabilising your muscles, these exercise equipment gives you the freedom to keep your movements as natural as possible, while giving you the chance to accomplish more as you workout. Use these Olympic weight plate discs as dumbbell weights for performing a set of squat, plate overhead lunge, plate floor press, bent-over row, and many more. The diversity of these Olympic weight plates help you tone every muscle in your body, resulting in a total body workout. PROTECTION ON IMPACT: The rubber casing on the FITSY OLYMPIC WEIGHT PLATES, acts as an additional layer of protection, to sustaining minimum damage to your floors, if the weight plates were to fall, at the same time the rubber casing reduces the noise caused by the cast iron weight plates when they hit the floor. SOLD IN PAIRS: FITSY OLYMPIC WEIGHT PLATES are a pair of rubber encased cast iron Olympic weight plates. These weight plates are compatible and can be used on Olympic barbell rods. Each rubber encased cast iron weight lifting plate weighs 15 kg (33 lbs.) the bore diameter is approx. 2 inch (5.8 cm) for Olympic Barbell Rod, while the plate & rsquo;s diameter is approx. 14 inch (35.56 cm). You are considering 15 KG x 2 Yellow colored weight plates.

KOBO Premium Quality Rubber Coated Olympic Plate 51mm, Black 5 kg

Product Details Pack Of Two Olympic Rod Plates (5 Kg x 2 = 10 Kg)51 mm Hole that Fits all Olympic Size RodsSolid Steel Ring Gives a Perfect Fit and Long Durability KOBO Premium Quality Rubber Coated Olympic Plate 51mm

KOBO Premium Quality Rubber Coated Plate 31mm, Black 10 kg

Product Details High Quality Cast Iron Used With Rubber Coated & Weight Embossed34 mm Hole that Fits all Standard Size RodsTri-Grip Handles for Easy Loading & Offloading KOBO Premium Quality Rubber Coated Plate 31mm