1. Made of high-grade steel, durable, anti-rust and corrosion resistance, can be used for a long time. 2. Torsion springs are designed to provide the optimum balance between spring suspension and support. 3. Easy to install, no cutting, welding or manufacturing required, saving you time and effort 4. Coiled tube, galvanized barrel shape and shiny color, perfect for motorcycles. 5. Help the proper seat for a balanced and comfortable ride.