Features1.The casters are made of transparent PU polyurethane material, with high transparency, not easy to age, and guaranteed not to scratch or leave any marks.2.Strong load-bearing: a single caster wheel bears 20-25 kg. Great for light furniture, desk chairs, it moves smoothly, has no markings, is quiet and wearable, and is a great addition to the home and office.3.The swivel casters are quiet and wear-resistant, no damage to the floor, smooth and labor-saving, the caster movement is no harsh sound, specially designed to protect hardwood, laminate, tile, slate and all other Hard floors.4.Our casters are perfect for wood, laminate, ceramic, terracotta or carpeted floors. A great alternative to floor protection seat pads.Specification:Material: PolyurethaneColor: transparentCaster Diameter: 50mm (2")Caster Width: 20.5mm (0.8")Screw rod diameter: 8mmScrew rod length:15mmmounting height: 67mmNotice:The size is measured by hand, there may be errors, please refer to the actual product.Package Included:4 swivel casters4 nuts