OneFitWonder Bumper Weight Plate Pairs (10lb/15lb/25lb/35lb/45lb/55lb Pairs) - Virgin Rubber w/Stainless Steel Insert - Crossfit, Weightlifting & Strength Training Equipment - Low Odor Virgin Rubber for high durability plus stainless steel "hooked" insert. Thinner than many of the competing bumpers- so you can load more weight on your bar! OneFitWonder bumpers use a rubber formulation that combines the ideal mix of low bounce with high durability. Weight Tolerance +/- 1% of declared weight Sold in pairs: 10lb, 15lb, 25lb, 35lb, 45lb or 55lb pairs