Key benefits Restores smooth, quiet sliding: brass center cores with nylon outer wheels reduce friction and noise for reliable door movement. Durable and lowmaintenance: nylon wheels resist wear while stainless steel screws and brass cores offer improved resistance to corrosion and long service life. Simple, secure fit: designed to match common shower glass dimensions so you can rollers quickly and accurately. What's included Set of 4 single shower door rollers with matching stainless steel screws. Compatibility and dimensions Glass thickness supported: 4–8 mm. Glass hole diameter required: 6–8 mm. Roller wheel diameters available: 19 mm, 23 mm, 25 mm, 27 mm. (Four rollers supplied; choose the diameter that matches your existing enclosure.) Features and performance Brass center core for strength and stable rotation. Nylon outer wheel for smooth gliding and reduced track wear. Designed to run easily on standard shower tracks to prevent sticking and minimize maintenance. Easy to install and clean: screws included for straightforward replacement. Practical use scenarios worn or noisy rollers on a residential sliding glass shower door to restore smooth operation. Upgrade rollers during bathroom renovation to improve durability and reduce track maintenance. Maintenance or kit for multiunit buildings, hotels, or fitness centers where frequent door use causes roller wear. Installation tips Verify your glass thickness is between 4 and 8 mm and the existing hole is 6–8 mm before . Match the roller diameter (19, 23, 25, or 27 mm) to your existing wheels for proper alignment and smooth sliding. Specifications summary Quantity: 4 rollers + stainless steel screws Materials: brass center core, nylon wheel, stainless steel screws Compatible glass thickness: 4–8 mm Compatible hole size: 6–8 mm Wheel diameters: 19, 23, 25, 27 mm