Body-Solid Rubber Olympic Bumper Plates. Quieter and helps protect the floor and equipment. Each bumper plate is fitted with a 3mm thick metal sleeve for proper fit and easy sliding. Use with Olympic size bars only. Raised white numbers markings. All plates are 17.7″ diameter. 35lb. plates are 2.5″ thick. IMPORTANT- These are rubber, but are not meant to be thrown around. Consistent abuse may lead to cracks or splits. ALSO AVAILABLE- color coded plates and commercial rated plates.