Material TPU (high end poly urethane material) coated Dumbbell head and chromed solid knurled steel bar Available sizes/weight 2.5kg/pc, 5kg/pc, 7.5kg/pc, 10kg/pc, 12.5kg/pc, 15kg/pc, 17.5kg/pc, 20kg/pc, 22.5kg/pc, 25kg/pc,27.5kg/pc, 30kg/pc, 35kg/pc, 40kg/pc, 45kg/pc, 50kg/pc, 55kg/pc, 60kg/pc Feature 1)Made of hard-wearing impact-resistant urethane material 2)It wont release odd smell 3)It provides a smooth, non-tacky feel 4)Wont stain hands & cause any rubber deteriorated problem like rubber disks can happen 5)With much higher tear strength than rubber can do 6)Weight tolerance: +/-3% ** High end grade quality disk which is excellent for commercial gym/club usagewith no indelible mark left on the dumbbell head. Package/Packing 1pc/carton about 1,000kgs/wooden case