... .00mm 4.high precision 2012 Newest Drawing Steel Compression Spring1) main material: carbon spring steel ,alloy spring steel, refractory steel, stainless steel, high temperature resisting alloy ... after receiving the balance.Item nameCompression springItem numberCS002Material availablecarbon steel wire, stainless steel wire, spring steel, brass, aluminum, copper, alloy, etcSurface treatmentpolishing, ...