【High-Quality Material】 The shower wheel is made of high-quality iron and nylon, allowing it to be used for a long time in a humid environment. It is not easy to corrode, has solid support and a long service life. 【Low Wear】 Nylon, flat and smooth pulley allows the door to be easily moved slowly. There is almost no noise when moving, very quiet and will not disturb your life. 【Pulley Size】 A total of 8 rollers are included in the package. Its diameter is 25mm, suitable for glass doors with a thickness of about 4 to 6mm and compatible with glass mounting holes with a diameter of 12 to 14mm. 【Easy to Use】 This replacement shower door roller is very easy to install. We include screws and nuts. Simply align the rollers with the glass mounting holes and use a screwdriver to tighten the screws. 【FUNCTIONAL AND PRACTICAL】 This bathroom sliding door roller is a good helper for the bathroom sliding door, helping you to open and close the door better. Can be used on massage cabins, bathrooms, etc. Note: Data are all measured manually, please allow an error of 1 to 3cm due to the differences in light and color. Display, there may be color differences, please refer to the actual received item.