Solid Rubber Olympic Bumper Plates, black. 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 2½" Thick. IMPORTANT- These are rubber, but are not meant to be thrown around. Consistent abuse may lead to cracks or splits. ALSO AVAILABLE- commercial rated plates.