... Namesupply conical metal spring Brand NameDashing SpringMaterialcarbon steel;spring steel;stainless steel, ... alloy steel,music wireWire dia0.1-5.0mmDimensionCustomizedSurface TreatmentZinc,Nickel,Silver,Golden,Tin,Powder coatingCapacityOEM, Our companyCertificateISO9001,ISO14001 ... a collection of technology development, spring design, production processing andsales service ...