spring, compression spring, torsion spring, extension spring 1) Wire Dia.: 0.01 - 12.0mm 2) ISO9001: ... 2000; ISO14001:2004 U Spring, Compression Spring, Torsion Spring, Extension Spring,Tension Spring1. Introduction of ONIC Factory Founded in1995, engineers ... treatment4.Photoes of Springs U spring, compression spring, torsion spring, extension spring