High-quality material: The wheel part is made of high-quality nylon, which is wear-resistant and quiet, and the bearing is made of high-quality metal, which is sealed, waterproof, rust-proof and durable > [Smooth opening and closing + mute]: nylon material, smooth surface, reduce friction, better mute, the main body of the wheel is made of nylon, smooth and quiet when sliding, strong stability, maintain door balance, allowing you to open doors and windows. It can slide easily, save worry and effort. [Wide Application]: Shower door sliding tracks are used for shower massage enclosures, whirlpool tubs, to ensure that using our sliding rails, doors or doors can slide easily and smoothly, and replace your damaged system of high quality shower room rollers. [Sliding design]: the design of the wheels sliding doors can save space. It is especially suitable for bathroom glass door. Sliding wheels are the source of strength to support the glass, with strong impact resistance, sturdiness and durability.