OneFitWonder Contrast Olympic Bumper Plate Pairs/10lb - 55lb Virgin Rubber with Steel Insert for Strength Training and Weightlifting Extremely durable virgin rubber with stainless steel inserts, will last for years in a garage or affiliate Raised, color lettering on both sides - know what size bumper plate at a glance Expertly designed stainless steel insert that remains firmly seated Higher density means thinner bumpers and you can fit more weight on the bar Low, dead bounce makes these safe in tight spaces