spring

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.