... price 1. Product Name: 2mm Spring Of Grade 452. Material: Steel GradeGB StandardCarbon%Silicon%Manganese%Phosphorus%Sulphur %Chromium%Nickel%Cuprum%45#0.44-0.460 ... ,9mm,10mm,11mm,12mm.Our Factory And Office BuildingMachine Of Our FactoryOur Spring Products 2mm Spring Of Grade 45(45#,60#,65#,C70DA,C82DA,70#,80#,72A,72B ...