For added security, further compress the rubber with a wrench via the nut under the swivel raceway. Listing is for a set of four 4 Service Caster Series #20 1-3/4'' expanding stem stainless steel swivel casters with 3'' diameter by 1-1/4'' wide black hard rubber wheels and top locking brakes capable of supporting a total weight of 1,100 lbs. 3'' SS Hard Rubber Swivel 1-3/4'' Expanding Stem Caster Set with Brake, 4PK The Series #20 features an innovative expanding stem that can easily adapt to the inside diameter of the opening, allowing for a secure fit in round or square tubes.
The non-marking, non-marring polyurethane wheels perform especially well on hard surfaces such as concrete, tile, and wood. Listing is for a set of four (4) Service Caster Series #20 7/8" expanding stem 316 stainless steel swivel casters, two (2) with top locking brakes, with 3-1/2" diameter by 1-1/4" wide red polyurethane wheels capable of supporting a total weight of 1,000 lbs.