composed of premium rubber Comfortable and simple to use ACTIVITIES AT HOME: Without having to go to the gym, you can simply adjust the weights and work out at home. 15 kg: (.5KG + 1.25KG + 2KG + 2.5KG) *2PCS+28mm*14" T Bar Weights supplied: 2 discs of 2, 0.5, and 2.5 kg; 4 discs of 2, 1.25, and 2 It has a 25 mm disc hole and a 25 cm short bar. Brand name Black, 15kg Adjustable Rubber Dumbbell with Rubber Material and Weight