Material: Shower door roller made of nylon and copper, sturdy and durable, stable quality and long life. Good elasticity, good wear resistance, wear-resistant wheels ensure smooth and quiet sliding. Easy installation: Shower door rollers are easy to move and install. Adjustable to allow you to adjust the height of the door, easy to assemble. For repair, only a screwdriver is required. Dimensions: Wheel diameter: 20 mm, Wheel thickness: 5.5 mm, Total length: approximately 33 mm. Suitable for: Glass door thickness: 4 to 6 mm. Glass hole size: 10-12 mm. Wide application: Shower enclosures - Replacement rollers for shower enclosures and massage cabins, bathrooms, hot tubs, and even furniture accessories. Thanks to our shower rollers, doors and sliding systems can operate easily and smoothly.