Shower door rollers 8pcs single wheels, including 4 upper rollers and 4 lower rollers. Good for replacement of shower door rollers. The wheel diameter is 25mm, wheel width is 6mm. The minimum glass mounting hole is 11mm, the maximum glass thickness is 6mm. The distance from the center of the mounting hole to the edge of the glass is 25mm. The shower door roller is made of brass rod and ABS plastic, it is rust-resistant, sturdy and durable. Comes with screws and plastic cover. These simple shower door rollers fit for glass shower doors. The sliding door roller set makes the door slide easily and saves effort. Practical hardware for sliding glass shower door. The bath way is easy to move and install. Besides, the door can be slid to save space.