General description Replacement shower sliding door roller designed for smooth operation of sliding glass doors. This set includes 8 pieces, making it ideal for most shower rooms. Technical specifications Wheel diameter: 20 mm Wheel thickness: 5.5 mm Total length: approx. 33 mm Glass thickness compatibility: 4-6 mm Pores size: 10-12 mm Materials: nylon and copper Usage Suitable for most shower rooms and steamers. Easy to clean, install, and adjust. Other information Package Contents: 8 x 20mm Shower Door Roller Note: Due to different computer displays, the actual product color may vary slightly from the images. Manual measurement may allow for an error of 1 to 3 mm.