The curved shower door roller is made of high-quality, anti-corrosion, sturdy and durable material with a long service life. 8 curved shower door rollers with a diameter of 23 mm, including 4 upper rollers and 4 lower rollers. The fixed pulley on the shower door can be removed and cleaned with a click, which is very convenient. 23 mm diameter curved shower door wheel, suitable for glass doors with a thickness of 4-6 mm, the upper and lower wheels are suitable for glass openings of 12-14 mm; the height of the upper wheel can be adjusted to 8 mm using stainless steel screws. The height of the lower wheel spring is automatically adjusted according to the height of the upper wheel. Shower glass door rollers help the door to slide smoothly and there is no noise when opening the shower door. Curved shower door rollers are suitable for massage rooms, bathtubs, hot tubs and even furniture. Make sure your door opens easily and smoothly with our high-quality shower glass door rollers. Replacement wheels for shower doors come with shock absorbers and mounting screws for easy installation and maintenance. Color: silver Material: plastic Package contents: 4 pairs x pulleys 8 x anti-collision blocks 8 x screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.