Wholesale 4in Poly on Aluminum w/Ball s 4 Swivel Lock 2 Brake

4 Inch Poly on Aluminum Caster Set with Ball Bearings 4 Swivel Lock 2 Brake. Listing is for a set of four (4) Service Caster Series 0 casters, two (2) swivel casters with side lock brakes & bolt on swivel locks and two (2) swivel casters with a bolt on swivel locks, with 4" diameter by 2" wide polyurethane on aluminum wheel and maintenance free precision ball wheel bearings capable of supporting a total weight of 2,800 lbs. (700 lbs./caster). When searching for a reliable and durable solution to your caster needs, rely on Service Caster Series 30 polyurethane aluminum wheel casters. The Series 0 features heavy duty polyurethane wheels that are chemically bonded to an aluminum core, providing a smooth roll over uneven surfaces without marking or marring floors.