This U Track is made of Hot Dip Galvanize Steel use for Sliding Gate Sliding Door Cantilever Gate Wheel. Reduce the wheel sliding friction. Surface treatment: Zinc Plated Usage/Application: Sliding Gate good toughness, low creep, abrasion resistance and chemical stability, durable to use Widely use, a must get for power/rolling dog/baby gates, industrial carts, assembly fixtures, containers, racks, and other equipment and projects industrial carts, assembly fixtures, containers, racks, and other equipment and projects Easy for installation, ensuring stable and excellent performance. It can be used in industrial machines, carts, doors and window Made of high quality and designed for lasting performance and long durability