Specifications
My company specialized in torsion spring,compression spring,extension spring.We can send sample for your testing.We are specialized in all various kinds of garage door torsion springs:
1). Material: carbon spring steel, alloy spring steel, stainless spring steel, and so on.
2). Finish: black oxide, zinc/nickel/chrome plating, power coating, passivate, oiled to prevent rust, and so on.
3). High good quality and long service-life.
4). Good hardness and resistance to both high and low quality.
5).Our company promises:reasonable prices,short production time and satisfactory after-sales service
