The Nike Grind Dumbbell is crafted from Nike Grind rubber, a byproduct of Nike's footwear manufacturing process. Measured by total product volume, each dumbbell is made with at least 20% Nike Grind rubber. With robust rubber and sculpted edges, this dumbbell offers both durability and comfort for all your training sessions. A medium knurled handle ensures a secure and comfortable grip, delivering the ideal balance of friction and control. The dumbbell is arguably the most versatile piece of gym equipment one can own — enabling thousands of movements to the athlete. Get grinding rep after rep! JUST DO IT. Because footwear color palettes vary from season to season, each batch of Nike Grind rubber is unique and yields a limited edition run of these dumbbells as they're released. Your dumbbells may differ slightly from the images shown. FEATURES Nike Grind Measured by total product volume, each dumbbell is made with at least 20% Nike Grind, a recycled material made from Nike's footwear manufacturing process Anti-Roll Durable rubber hex construction prevents rolling and reduces damage to floors Sculpted Edges Contoured edges provide comfort while lifting SPECS Weight range: 4KG - 12.5KG Weight Precision: +/- 3% Handle Diameter: 28mm to 37mm depending on size Handle Width: 128mm Handle Type: Ergonomic Handle Material: Chrome-plated Steel Knurling: Medium