Material: Shower door roller made of nylon and copper, sturdy and durable, stable in quality and have a long service life. 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: 4-6 mm. 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. With our shower door rollers, door and sliding systems can be easily and smoothly. Easy Installation: Shower door rollers easy to move and install. For repair, only one screwdriver is needed. Specifications: Product name: Sliding shower door rollers/shower roller/Shower door runners /shower door rollers Materials: nylon and copper. Wheel diameter: 25 mm - Wheel thickness: 5.5mm - Total length: about 33mm. Glass thickness: 4-6mm. Hole : 10-12 mm Suitable for most shower enclosures. Replacement castors for shower enclosures and steam cabins. Package contents: 8 shower door rollers 25 mm.