1. Olympic Rubber Barbell Plates 2. ISO9001/ 14001/ CE 3. 2.5kg, 5kg,10kg,15kg,20kg, 25kg 4. Olympic plates 5. Manufac Olympic Rubber Barbell Plates:1. barbell plates2. rubber coated, cast iron 3. 28mm hole 4. bush dia: 26~32mm5. color: black or customized6. available size: 2.5kg, 5kg,10kg,15kg,20kg, 25kg Olympic Rubber Barbell Plates