Our company are specilized in all kinds of compression springs,torsion springs,extension spring and specail springs. 1. wire diameter of compression spring:0.2mm~10mm 2. Material range: carbon steel,alloy spring steel,music wire,steel,and stainless steel,iron,plated steel,alloy steel ,bronze,phosphor copper,and beryllium copper;etc.3. surface treament:black oxide ,Zinc/Nicke/Chrome plating,power coating,oiled to prevent rust,passivate,etc.
