There caster wheels have strong load-bearing force, smooth rotation, low noise when in use, let you concentrate on work, improving your work efficiency. The wheels are designed for use, performing wear resistance and durability. Add these chair wheel into your office supplies list! Features -Color:Black -Material:PU, nylon -Size:8.10X5.50X5.50cm/3.18X2.16X2.16in - Effortless movement: You can move your chair easily to any places with these swivel casters, smooth and effortless. - Low noise: These chair wheels produce little noise when in use, keeping you and people around you from being disturbed. - materials: wheels use thick stems and plastic boards, heavy duty designs, safe and reliable. - Quick installation: The structure of chair wheels is simple with stem, making them easy to install on chairs, saving your time. - No damage to floor: These wheels are friendly to all kinds of floor, no scratches or marks on surfaces like hardwood, carpet, tile and more. Package list: 5 wheels