Hard Rubber Wheel Swivel Expanding Stem Set 2 Brake SCC

The listing is for a set of four (4) Service Caster series #20 3/4" expanding stem swivel casters, two (2) with top locking brakes, with 4" diameter by 1-1/4" wide black hard rubber wheels capable of supporting a total weight of 1,200 lbs. (300 lbs./caster).