... spring,coil spring,spiral spring1) ISO 9001:2000 Certificated2) Wire dia. Range:0.02-8mm3) Biggest manufactures of ... variable diameter6) Important Parameter: outer diameter, inner diameter, wire diameter, free length, solid height7) Common materials of construction ... springs include stainless steel, high carbon steel wire, alloy steel or music wire, nickel base alloy wire, brass, and hard drawn.8) ...