Our Fed Fitness bumper plates are manufactured from high-density virgin rubber. They stay fully intact even after 12,000 drops from a height of 1.8 meters. With a hardness rating of 85 Shore A, these plates produce less bounce and noise, while also protecting your floors from scratches and impact. Fitted with a 2-inch 304 stainless steel insert, they work perfectly with standard Olympic bars, and every plate keeps weight accuracy within 1%. Following Iwf standard color coding, you can tell different weights apart at a glance. The raised textured hub and 45degree(s) beveled edges create an ergonomic grip for safe and easy handling. The premium rubber material is gentle on all floor types, great for workouts at home or in commercial gyms. This package comes with two 45 Lb bumper plates.