Black Premium IWF Training Bumpers (KG) Pairs and SetsTwo Nickel Weight Tolerance: Far exceeds IWF Training Plate Standards of 0. 8% Superior Quality Virgin Rubber: Provides exceptional impact resistance, ensuring lasting durability Drop Tested 30,000 Times: Dropped from a height of 8 feet ensuring longevity and reliability Shore A Durometer Rating: Rated at 90 for the perfect balance between firmness and flexibility IWF Color Coded Design: Vibrant color coding for easy weight identification and quick