RAGE Fitness Olympic Bumper (Sold Individually 10lb, 15lb, 25lb, 35lb, 45lb), Steel Insert, Crossfit, Strength Training, Bench Press, Squats, Powerlifting Made to Olympic standards, these plates are 17.5 in diameter 2 steel collar center that ensures superior control and fits onto all standard bars, racks and sleds Consisting of a quality solid composite of recycled rubber RAGE bumpers are available in 5 weights: 10lb, 15lb, 25lb, 35lb and 45lb. SOLD INDIVIDUALLY. These are easy on your hands, safe on your floors and environmentally friendly