Specialized in all kinds of compression springs, torsion springs, extension spring and special 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.
