The office chair wheels can be safe on all flooring types including carpet, wood, laminate, tile, marble, and concrete. The wheel design prevents scratching and marking while maintaining excellent mobility across any surface. Unlike standard casters, the swivel casters cause no damage to any type of flooringSpecificationColor: BlackMaterial: PULoad Capacity: 50kg / 110 lbFit Hole: 6.8 mm /0.27 inchWheel Size: 50 x 23 mm / 1.97 x 0.91 inch (D x H)Packing List: 2 Pack x Chair Caster Wheels; 2 Pack x Screws +2 Pack x NutsAdvantageDurable Material - The push cart wheels are made of PU which is lightweight and offers a high load capacity, and have good smooth rolling quietly when used.
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