6" Heavy Duty Plate Casters 2200lbs Load Capacity Lockable Bearing Caster Wheels with Brakes Industrial Swivel Top Plate Casters Wheels Set of 4 for Cart, Trolleys, Furniture and Workbench: Amazon.com: Industrial &
5 in. Polyurethane Swivel Caster
3 in. Clear Polyurethane Light Duty Swivel Caster with Brake