Material: Shower door roller made of nylon and copper, sturdy and durable, stable quality and long service life. The wear-resistant wheels are smooth and have low sliding noise. Size: Wheel diameter: 25mm, wheel thickness: 5.5mm, total length: about 33mm. Suitable for: Glass door thickness: 4-6mm. Dimensions of the hole in the glass: 10-12mm. Wide application: Shower cabin - replacement rollers for shower cabins and massage cabins, bathrooms, hot tubs and even furniture fittings. Our shower rollers make door and sliding systems move easily and smoothly. Easy installation: Shower door rollers easy to move and install. Only a screwdriver is needed for repair.