Scaffold Casters 6"x2" Heavy Duty Casters, Dual Locking Rubber Swivel Caster 360 Degrees Industrial Casters, Set of 4 with up to 4400LB CapacityFeature Details Material Rubber tread on cast iron core Wheel Diameter 6 inches (Overall Height: See images for details) Wheel Width 2 inches Brake Lock both wheel and the swivel Load Capacity Wheel Size Per Wheel Set of 4 6 inches 1100 lbs 4400 lbs Sealed upper ball race Bearing Roller Bearing Round pin hole Applications Wood storage racks Workbenches Rolling work boxes Cabinets Tool boxes Gate fence wheels Industrial & warehouse use Hotel,