... ROHS 4.free sample,made by CNC spring machine High tension Double rings slinky extension spring with hooks A: Specification Material:stainless ... .wire dia:0.15-65mmstandard: JIS,ISO,DINtrade term: Ex works,FOB,C&F,CIFpayment term: T/T, L/ ... temperaturesCan be used in various corrosive mediumsMain material: carbon spring steel, alloy spring steel, refractory steel, stainless steel, high temperature ...