Nylon Swivel Expanding Stem Caster Set 2 Total Lock Brakes

Listing is for a set of four (4) Service Caster Series #20 7/8" expanding stem swivel casters, two (2) with total locking brakes, with 4" diameter by 1-1/4" wide nylon wheels capable of supporting a total weight of 1,200 lbs. (300 lbs./caster).