4 Piece Nylon Swivel Expanding Stem Caster Set

Listing is for a set of four (4) Service Caster Series #20 1" expanding stem 316 stainless steel swivel casters, two (2) with total locking brakes, with 3" diameter by 1-1/4" wide nylon wheels capable of supporting a total weight of 1,200 lbs. (300 lbs./caster).