General description Set of 4 double rollers for shower doors, including 2 upper rollers and 2 lower rollers. These rollers are designed to fit most shower doors. Technical specifications Material: Copper swing + electroplating plastic alloy Wheel diameter: 23 mm Wheel width: 5 mm Glass mounting hole: 12-14 mm Glass thickness: 4-6 mm Other information Please allow 0.5-2 cm differences due to manual measurement. Due to light and screen differences, the item's color may be slightly different from the pictures. Package Includes: 2 Upper Shower Door Rollers, 2 Lower Shower Door Rollers