Material: Outer wheel made of wear-resistant material and internal bearing of stainless steel for durability and silent operation. Size: Available in 19mm, 23mm, and 25mm diameters to fit various door types. Installation: Easy replacement with a screwdriver; simply loosen, replace, and tighten bolts. Features: Offers good stability, low friction coefficient, and excellent mute effect for smooth movement. Application: Suitable for shower rooms, steam rooms, bathtubs, and furniture fittings for versatile use.