XIANQI Premium MaterialThe chair castors are made of outstanding PP, PA, and nylon material, the bearing rod with high hardness provides years of lightweight rolling and durability, sturdy for long time use. Swivel Design360 degrees rotated caster wheel provide smooth movement, moving chairs easily and effortlessly. With brake design, wheel can be stopped easily and stay in place. No Scratch DesignWide wheel structure can withstand higher pressure, quiet and smooth, will not damage the floor, scratch or leave no trace on the surface. Each wheel is fashionable, comfortable, stable and quiet. Wide ApplicationsThe office chair wheels are suitable for office chairs, divan bed, sofa, captains chair, single bed, ottoman bed, and more. These chair wheels make your chairs look more fashionable and more comfortable. Colour: Black Single size: 1.5 inches Quantity delivered: 10 pieces