Ball Casters
8 X 2 Inch Heavy Duty Scaffolding Rubber Swivel Caster 4Pcs 
Type : Furniture Caster
Material : Rubber + Steel
Brake Type : Dual Lock Brake
Wheel Diameter : 8 inch
Wheel Width : 2 inch
Connecting Rods : 1.4 x 4 inch
Bore Diameter : 0.5 inch
Load Capacity : 1100 lb each
Package Size : 14 x 14 x 9 inch
Gross Weight : 21.82 kg/48 lb