1.Drawing spring compression springs 2.Different shapes of hooks available 3.wire diameter: 0.09mm-6.00mm 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, corrosion-resistant alloy and bronze.2) Finish: chromium-plated, zinc-plated, gold-plated, silver-plated ...