 The Fitmus Hi-temp bumper plate is used for high schools, military outposts and home gyms all over the world  Hi-Temp rubber weights are proven performers in the toughest environments from heat, cold.  Hi-temp Bumper Plate Used in the fittest games on earth.  Quieter and safer to floors than steel plates. 10 and 15 Lb plates are the same 17.5" diameter as the heavier plates.  Fitmus Hi-temp bumper plate has below feature:  Made form durable Recycled Rubber Great for Olympic Lifting hardness SHA (65-75) The bumper plates have a 2" stainless steel insert All Weights are 17.5" in Diameter. Weights are available in :10lb,15lb,25lb,35lb,45lb,55lb and 5kg,10kg,15kg,20kg,25kg. Sold as piece The Hi-Temp plates are made to handle the everyday abuse of Traditional, Home or College gyms