1.20 years'experience in spring 2.Certified by ISO/TS16949 3.Material: 60 Si2Mn, 55CrSi 4.Cold coiled by automatic machine Wire diameter: 0.20mm – 18mmVariety of wire types & shapes including square and rectangularEnd configurations including external hooks, bend across center, etc. Please specify helix direction E-coating torsion spring
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