Product Name: Shower Sliding Door Roller; Color: Silver; Size: 23mm. High Quality: Made of high quality nylon, zinc alloy and stainless steel. Not easy to rust, good wear resistance, stable quality, long service life, strong and durable. Unique Design: The upper wheel is adjusted by turning the screw; The lower wheel has a buffer spring, which is used to buckle the inside of the slot. These rollers are suitable for 4-8mm thick glass, and the diameter of the glass opening should be greater than 12mm. Wide range of applications: It can be used for sliding doors in most shower rooms, steam rooms, and corridors. 23mm Shower Roller Top and Bottom Rollers for Shower Door 23mm Shower Door Rollers Shower Sliding Door Shower Rollers Shower Sliding Door Specifications: ProductP: Shower Door ColorP: Silver MaterialP: Nylon, zinc alloy, stainless steel Size: Roller Diameter: 23mm Upper Wheel: 33*22mm Lower wheel: 42*22mm Gasket: 31*19.5mm Screw: M4*15 Package Contents: 1 x Sliding Door Caster