High Quality: Made of premium nylon. Suitable for all types of shower enclosures. Ensures your door slides more comfortably. No worries, no money lost: Have you bought a sliding door system and it broke? Are you panicking, thinking you'll have to buy a new one. Forget it! Replacement rollers are available on the market, compatible with all sliding door systems. If your shower door is having trouble sliding, try this quick fix and save money and hassle! Versatile: Shower door rollers are suitable for shower enclosures, massage rooms, bathtubs, whirlpools, and even furniture accessories. Ensures easy and smooth door opening. Replaces damaged systems. High-quality shower rollers. Roller assembly: Shower doors roll smoothly, moving forward or backward effortlessly. The hydromassage cartridge ensures optimal weight distribution of the glass and controls its movement in the desired direction. This further improves the durability and longevity of the product. Steel wheel section: 9 mm diameter x 3 mm height Type: 4 shower door rollers. Wheel thickness: 5 mm. Screws included. Suitable for shower doors with a thickness of 4 to 6 mm. Wheel diameter: 20 mm, inner bore: 6 mm, M6 screw fixing. The pulley is made of copper and POM, and the lead screw is made of stainless steel. Made of corrosion- and rust-resistant steel, this pulley offers excellent performance. It provides strong load-bearing capacity, excellent stability, low friction, and excellent noise reduction. Easy to install, it is commonly used for bathroom sliding glass door pulleys.