High Quality: High-quality POM plastic. Adapts to various shower types. Ensures your doors glide more smoothly. No wasted money: Did you buy a sliding system and it's broken? You're dreading having to buy a new one. Forget it! There are replacement rollers for shower doors that fit all sliding systems in your home. If you're struggling to slide your shower doors, use this quick fix and don't waste your money. Use Anywhere: Shower door rollers for showers, massage cabins, bathtubs, whirlpools, and even for furniture accessories. Ensure the door or doors open easily and smoothly. Replace your broken system. Premium Shower Roller Rolling Component: Smooth door rolling with an effortless forward or backward movement for shower cabins, hydromassage boxes clearly performs the assigned task, distributes the mass of the glass, controls the movement in the given direction. This gives the product even more durability and a longer lifespan. Steel part of the wheel: 9 mm diameter x 3 mm height. Type: 4 rollers for shower door. Wheel thickness: 5 mm. Supplied with screws. Suitable for 4-6 mm thick shower door. Roller diameter: 20 mm, inner hole 6 mm, fixed with M6 screw. The roller is made of copper + POM impeller, and the screw is made of stainless steel. Corrosion and rust-resistant steel, good overall performance. The roller's load-bearing capacity, good stability, low coefficient of friction, good damping effect. Easy installation, often used for bathroom sliding glass door rollers.