The caster wheel surface is smooth and gentle, feature silent and stable rolling, without any noise, ensure the wheels roll smoothly on hardwood or slick style flooring, greatly helps to protect hardwood floors, tile, slate and laminate from getting scratched or nicked.Features- Color: Black- Material: Nylon, iron- Size:6.00X5.00X5.00cm/ 2.36X1.97X1.97inch - Making your chair more convenient and labor-saving to move.- Enjoy noiseless and smooth gliding at your home or office.- The wheels roll smoothly and quietly on virtually any surface, so you wont be bothered because of the constant noise.- Our caster wheels are a practical solution to moving heavy pieces of furniture, as well as many other heavy items.- Easy to install and easy to use. This rolling wheel will bring much convenience to our life.Packing list: 5 x caster wheels