... ODM 4>CNC automatic production 5>fast delivery vehicle heavy duty suspension spring1 FactoryEstablished in 20052Trade experience Over 15 years, ... 0.55in(14mm)4Material Stainless steel, carbon steel, spring steel, alloy spring steel, refractory steel, brass, bronze, etc.5Surface treatment ... service for our customers. ABOUT OUR COMPANY Fuzhou Henp Spring Co., Ltd. was established in 2005 as a ...