High-quality POM plastic construction ensures durability and smooth operation for various shower door systems. Say goodbye to sliding issues and costly replacements. This replacement shower door roller fixes most sliding systems, providing a reliable solution for stuck or difficult-to-move shower doors. Ideal for use with shower enclosures, massage cabins, bathtubs, whirlpools, and furniture fittings. Ensures doors glide open and closed effortlessly. Features precision-engineered bearing components for smooth door movement, with front and back alignment design. Effectively supports glass weight and controls directional movement, enhancing durability and extending service life. Steel wheel core measures 9mm in diameter and 3mm in height, designed for strength and long-term performance.