Size: Outer diameter=23mm / 0.91inch, thickness=7mm / 0.27inch, inner hole=5mm / 0.20inch This pulley is reinforced nylon and high carbon steel bearings, with strong load-bearing capacity Suitable for most furniture hardware accessories, mobile door and window, glass sliding door and window, aluminum alloy door and window, shower room pulleys and drawers The package includes: 10pcs Pulley, which you can use in many projects Smooth and good mute-effect When sliding the door, there is no and it slides smoothly, Manufacturer: HZBB