... CNC automatic production 5>fast delivery auto suspension coil spring 1 FactoryEstablished in 20052Trade experience Over 15 years, OEM ... steel, spring steel, alloy spring steel, refractory steel, brass, bronze, etc.5Surface treatment Zinc-plated, nickel-plated, chrome-plated, silver-plated, ... service for our customers. ABOUT OUR COMPANY Fuzhou Henp Spring Co., Ltd. was established in 2005 as a ...