4 Piece Rubber Expanding Caster Set with 2 Brakes

The listing is for a set of four (4) service caster series #20 1-1/8" expanding stem swivel casters, two (2) with top locking brakes, with 3" diameter by 1-1/4" wide black hard rubber wheels capable of supporting a total weight of 1,100 lbs. (275 lbs./caster).