High Quality: High quality POM plastic. It adapts to different types of showers. Ensures your doors slide most comfortably No decompression and no wasted money: Bought a sliding system and it broke? You think in horror who now has to buy a new one. Forget ! There is a replacement shower door roller that will allow you to repair any sliding system in your home. If you're having trouble with sliding shower doors, use this quick fix and don't waste your money on furniture fittings. Make sure that with our guides the door or doors open easily and smoothly. Replace your broken shower rollers with a high quality rolling component : The smooth door slider is lightweight and easily rolls forwards or backwards - Shower rollers for shower stalls - The Whirlpool boxes clearly perform the task assigned to them, they mass glass, controlling movement in the given direction. This gives the product greater durability and longer life Steel part of the wheel: 9mm diameter x 3mm high