Size Key – for CAP Strength Olympic Rubber Bumper Plates15lb = Olympic Bumper Plate Set (15lbx2)20lb = Olympic Bumper Plate Set (10lbx2)25lb = Olympic Bumper Plate Set (25lbx2)35lb = Olympic Bumper Plate (35lbx1)45lb = Olympic Bumper Plate (45lbx1)Get the most out of your workout and take your weight lifting and power lifting to the next level with these Strength Olympic Rubber Bumper Plates. Each Olympic bumper plate is constructed with a steel insert and durable rubber to reduce weight room noise so you can still hear your exercise music and you won't disturb others working out around you. The CAP bumper plate’s uniform diameter allows for an evenly distributed impact so that it can withstand drops and is suited for lifting platforms, gyms and garage floors. These versatile plates can be used for a variety of exercises in functional fitness and cross training. Each bumper plate features a 2-inch center hole to fit onto any Olympic style barbell.