The curved shower door roller is made of high-quality materials, anti-corrosion, sturdy and durable, with a long service life. This set includes 8 curved shower door rollers with a diameter of 23mm, consisting of 4 top rollers and 4 bottom rollers. The fixed pulley of the shower door can be easily removed and cleaned with one click, offering convenient maintenance. The 23mm diameter curved shower door wheel is suitable for glass doors with a thickness of 4-6mm. The upper and lower wheels fit glass apertures of 12-14mm. The height of the top wheel can be adjusted up to 8mm via stainless steel screws. The lower wheel spring automatically adjusts based on the height of the upper wheel. These shower glass door rollers ensure smooth sliding operation and quiet performance when opening and closing the shower door. The curved rollers are suitable for use in massage rooms, bathtubs, tub enclosures, and other similar applications. Improve your door’s functionality with these high-quality replacement rollers. Replacement shower door wheels come with anti-collision blocks and mounting screws for easy installation and upkeep. Color: silver Material: plastic Package Contents: 4 pairs x pulleys 8 x anti-collision blocks 8 x screws Note: This package includes only the items listed above. Other products are not included. Note: Lighting effects and different display screens may cause slight variations in the color of the item as seen in the image compared to the actual product. Measurement may vary by +/- 1-3cm due to manual measuring.