... 14001 ROHS 4.free sample torsion springMaterial:stainless steel,carbon steel,alloy steel Applications: Automotive, medical device, electronics,toy ... various corrosive mediumsMain material: carbon spring steel, alloy spring steel, refractory steel, stainless steel, high temperature resisting alloy, corrosion-resistant ... 3) Different torques4) Suit price spring steel torsion spring from china supplier