4" Industrial Heavy Duty Casters Set of 4, Polyurethane on Cast Iron Caster Wheels, 2 Swivel & 2 Rigid, 1800 lbs Capacity, for Cart, Workbench, Toolbox, Equipment

Heavy Duty Industrial ConstructionThese heavy duty casters feature a cast iron core with premium polyurethane tread for superior durability and long service life. Built as reliable industrial casters for demanding environments. | Strong Load CapacityThis casters set of 4 heavy duty supports up to 1800 lbs total capacity, with 450 lbs per wheel, ideal for carts, toolboxes, and heavy equipment. | Dual Ball Bearings for Smooth RollingEquipped with dual ball bearing design, these 4 inch caster wheels provide smoother rotation, reduced friction, and easier movement even under load. | Floor-Protecting & Wear-ResistantPolyurethane caster wheels roll quietly, resist abrasion, oil, and chemicals, and protect floors from scratches and marks. | Wide Industrial Applications: Perfect casters for dollies, workbenches, carts, and machinery requiring compact yet powerful heavy duty casters.