... : Our products complies with the Chinese standards of 65MN, as well as the international standards of SAE1070 and C70. Specifications range from ... same time, we produce all kind of steel spring,which can be used in all kinds of appliance:starter,balancer,clock,seat belt ... ,Specification:0.2-2.0mm x 5-50mm, in colors of black,blue or white. From 2008, we developed new product ...