Stable Construction: NINOSO 5 inch caster wheels are made of thickened steel construction for high load, featuring high quality polyurethane wheels. CASTER SIZE: Caster wheel diameter: 5", width: 1.27". Top plate size: 3.62"x 2.5"; hole spacing:2.75" x 1.75". Total height of caster: 6.37". Max Flexibility & Smooth Rolling: Max Flexibility & Smooth Rolling: These caster wheels heavy duty offer 360-degree rotation which make turning the mating equipment possible. Made of non-marking polyurethane with double precision ball bearing, these caster wheels are very quiet and smooth while rolling, safe for all types of floor including wood, hardwood, laminate, vinyl, tile and carpet floors. Universal: 5 inch swivel caster wheels widely used in a wide range of indoor and outdoor, industrial and residential applications for carts, workbenches, furniture and more, allowing you to effortlessly turn large items are moved to any area and saving effort. Casters Set of 4: Each replacement caster wheels loading 350lbs, 4 casters replacement can carry 1400lbs. The replacement casters can withstand most chemicals, solvents, acids and oils without having to worry about any environmental effects, giving you a perfect experience. NINOSO 5" Caster Set of 4, Heavy Duty Industrial Caster Wheels with Load 1400lbs Capacity, Polyurethane Shopping Cart Wheels Replacement for Furniture Equipment Dollies(2 Swivel & 2 Rigid)