1. [High quality material] The use of high quality nylon and copper materials, nylon pulleys, is not easy to crack, good wear resistance and long service life. The design of the round cover gasket protects the screws and improves the anti-rust ability. 2. [Scope of use] The diameter of the copper rod pulley is 23mm, suitable for 15-17mm glass opening and 4-6mm glass thickness. 3. [Sliding flexible] The design of the sliding door pulley in the shower room combines high strength, excellent flexibility and ideal sliding properties, which can easily and smoothly open the door and the sliding system. 4. [Easy replacement] When you need to replace the shower roller guide, you can repair it yourself, usually only the right screwdriver can be replaced. 5. [Wide use] Suitable for most shower rooms, shower rooms and steam rooms, it can help the shower door to open easily, reduce resistance and reduce friction noise. Quantity: 4 pieces Note: this does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!