Weight: 9 kg The Sport-Thieme Rubber Hex Dumbbell: The hex dumbbell that won't roll away. The Sport-Thieme Rubber Hex Dumbbell is available in weight increments from 1 to 30 kg, allowing everyone to engage in personalized strength training tailored to their fitness level. The dumbbell is made of steel and features a chrome-plated, knurled grip for optimal hold, even with sweaty hands. Thanks to the hexagonal shape of the dumbbell heads, the weights won't roll away. The rubber coating also protects the floor from damage if the dumbbell is dropped. Product details: Grip chrome-plated and knurled, diameter of dumbbell 1-5 kg: 28 mm, diameter of dumbbell 6-30 kg: 32 mm, weight: 9.0 kg, material: cast iron, steel, rubber, grip texture: knurled surface, bar material: steel, coating: chrome-plated, outer material of weight: rubber, material of weight: cast iron.