We are specialized in all various kinds of extension springs and abnormity springs:

1).  Wire diameter from 0.1mm-10mm.

2).  Material: carbon spring steel, alloy spring steel, stainless spring steel, etc.

3).  Finish: black oxide, zinc/nickel/chrome plating, power coating, passivate, oiled to prevent rust, and so on.

4).  High good quality and long service-life.

5).  Good hardness and resistance to both high and low quality.