Zinc Plated Steel UPVC Sliding Window and Door Wheels Rollers Gate Rolling Wheels ISO9001 certified High-quality steel sliding door wheels designed for durability and smooth operation in residential windows. These wheels feature a robust construction with excellent load-bearing capacity. Key Features Made from high-grade steel for durability and strength Includes ball bearings or roller bearings to minimize friction Rated for heavy-duty use with 80kg load capacity Smooth,