1.Name: hot coil big compression spring 2.Style: alloy Steel 3.All the ... of automobiles- Meet with specific fatigue testing requirementsAt Lihuan Spring, we not only design, manufacture, and test springs ... : Compression Spring, Extension spring, Torsion Spring, Battery Spring, Power spring, Coil spring, leaf spring, suspension spring, etc. 2) Main material: Carbon spring steel, alloy spring steel, ...