... :Single torsion,double torsion and multi-torsion 2:MOQ:2000PCS wire forming torsion spring Please contact us to get lowest Offer.1 ... .Material:carbon steel;spring steel;stainless steel,alloy steel.2.Wire Dia.:0.01mm-10mm3.ISO9001 certificate.4.We can do ... ,powder coating.6.Applications: Automotive, medical device, electronics, toy,etc wire forming torsion spring