4piece replacement rollers for sliding glass shower doors, designed for reliable, longlasting performance on glass 4–8 mm thick. Key benefits Smooth, quiet operation: ballbearing structure prevents sticking and reduces noise for effortless opening and closing. Built for humid environments: combination of plastic, nylon, 304 stainless steel bearings, ABS, and brass resists corrosion and extends service life in bathrooms and steam rooms. Easy maintenance: quickrelease mechanism lets you remove wheels for cleaning or replacement without disassembling the whole assembly. Simple fit and installation: compatible with most shower enclosures, cabins and steam rooms; white finish integrates discreetly with modern fixtures. Important specifications Pack contents: 4 shower door rollers. Glass thickness compatibility: 4–8 mm. Wheel diameter options: 19 mm, 23 mm, 25 mm, 27 mm, or 29 mm (choose the size that matches your track). Mounting hole requirement: 15–17 mm diameter. Materials: plastic, nylon, 304 stainless steel bearings, ABS, brass. Finish: white. How it solves common problems Eliminates sticking and grinding caused by worn rollers or corroded bearings. Restores smooth alignment and glide when doors wobble or catch. Reduces noise and effort, improving daily usability for all household members. Typical use scenarios Home shower : worn rollers on a frameless or framed sliding shower door (glass 4–8 mm) to restore smooth operation without replacing the entire assembly. Steam room or cabin maintenance: Swap in corrosionresistant rollers with stainless steel bearings to prevent premature failure in humidity installations. Renovation or upgrade: Fit appropriately sized wheels (19–29 mm) and use the quickrelease feature to simplify cleaning and periodic maintenance. Installation notes Verify wheel diameter and ensure the mounting hole is 15–17 mm before . Designed for easy installation; quickrelease mechanism facilitates fast removal and reattachment for maintenance. Reliable replacement parts that match original function and fit while improving durability and ease of use.