... 65mm 3.quick delivery,ISO9001, 14001 ROHS 4.free sample torsion springMaterial:stainless steel,carbon steel,alloy steel Applications: Automotive, ... , telecommunication, communication, aviation, space and other civil fieldsFeatures: 1) Torsion spring of ultra fine wire with wire diameter less than ... ) High precision 3) Different torques4) Suit price spring steel torsion spring from china supplier