Poly on Aluminum Swivel Caster with Ball Bearings (Set of 4)

The listing is for a set of four (4) service caster series #20 swivel casters, four (4) swivel casters with 4” diameter by 2" wide polyurethane on the aluminum wheel, and maintenance-free precision ball wheel bearings. Supports a total weight of 1,800 lbs (450 lbs/per caster).