Features: 

• Made from quality Urethane for durability
• Dead bounce
• Color-molded. Weight: 10LB or 5KG (black), 25LB or 10KG (green), 35LB or 15KG (yellow), 45LB or 20KG (blue), 55LB or 25KG (red)
• Weight Tolerance: +/- 1%
• Diameter: 450MM (IWF Standard)
• 140MM Hard Chrome Insert
• Suitable for all Olympic bars
• Do no drop the 10lbs alone