... Automotive, medical device, electronics,toy and so onThis spring will not be magenetic field,not fever,not be broken ... be used in various corrosive mediumsMain material: carbon spring steel, alloy spring steel, refractory steel, stainless steel, high temperature ... wire diameter less than 0.1mm 2) High precision 3) Different torques4) Suit price spring steel torsion spring from china supplier