Solid Rubber Olympic Bumper Plates- Will notbreak when dropped, helps protect the floor. Each bumper plate isfitted with a metal sleeve for proper fit and easy sliding.. Use withOlympic size bars only. Features: Solid, high quality, resilient rubber (no crumb rubber used) White numbers markings Processed with 30 years rubber experience to be the best in quality, service and value Molds are chrome plated to assure a pristine, consistent and repeatable finish Specs: Brass inserts are 3mm thick, which is about three times the industry standard to provide strength and longevity of service Rubber compound has been chemically refined to provide the best product with consistent properties All are 17.7" diameter Thicknesses of the plates are 10 lb.- 1", 15 lb.- 1½", 25 lb.- 1¾", 35lb.- 2½", 45 lb.- 3¼" Available in: 10lb - Green 15lb - Black 25lb - Yellow 35lb - Blue 45lb - Red 260lb Set - includes 2 each: 10lb, 15lb, 25lb, 35lb, 45lb Thethicknesses of the plates are 10 lb.- 1", 15 lb.- 1½", 25 lb.- 1¾", 35lb.- 2½", 45 lb.- 3¼".