Material: Shower door roller made of nylon and copper, sturdy and durable, stable in quality and has a long service life. The wear-resistant wheels are smooth and low sliding noise. Size: wheel diameter: 25mm, wheel thickness: 5.5mm, total length: approx. 33 mm. Suitable for: glass door thickness: 4 to 6mm. Dimensions of the hole in the glass: 10-12 mm. Wide application: shower cabin - Replacement castors for shower cabins and massage cabins, bathrooms, jacuzzi and even for furniture fittings. Thanks to our shower casters, door and sliding systems can be moved easily and smoothly. Easy installation: Shower door rollers easy to move and install. For repair, only one screwdriver is needed. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.