extension spring for sports equipment

1. What shown in the picture is one of our products. 2.We are specialized in producing many kind of furniture spring in xiamen china. 3.Our company uses in imported fully-automtic Nc precision spring facilities. 4.The surface treatment can be zinc trivalent plated,pvc and so on. 5.We can order production of your request. 6.With certification:ISO9001:2000. 7.Competition price and first-class quality. 8.If you have any question,pls contact us.