... 2 is a tyco electronicsAutomobile Brake Chamber Spring ISO9000-2000 Certification.Suitable Medium:Automobile,Auto,CarWe ... 0.1mm-20mm.2). Material: carbon spring steel, alloy spring steel, stainless spring steel, etc.3). Finish: black ... springcoil/spiral/conical spring ;compression/extension/tension/torsion springMaterialStainless steel, carbon steel, spring steel, alloy spring steel, refractory steel ...