Material: Brass shower door roller with stainless steel screws, corrosion resistant, non-rusting, durable, and long-lasting. Bearing Component: Ensures smooth door operation with slight forward or backward movement. These shower rollers provide effortless sliding for shower cabins and hydromassage enclosures, effectively supporting the glass weight and controlling movement in the intended direction, enhancing durability and extending service life. Waterproof: Features special ultra-sealing grease with PTFE content designed for shower enclosures, significantly prolonging wheel life. Provides excellent protection against moisture, prevents corrosion, forms a long-lasting water-repellent barrier, and helps extend the mechanism's lifespan. Uses: Ideal for sliding shower doors, massage shower stalls, bathtubs, hot tubs, and furniture trim applications. Product Use: Designed for bathroom glass sliding doors. Product Material: Nylon roller with brass housing. Product Specification: Diameter 25 mm. Quantity: 4 pieces.