... Parts 1.Material:Brass copper 2.Tolerance:0.01mm 3.Certification: ... steel ,cold work steel ,Spring steel , martensitic steel,aluminum ,brass, bronze,copper, according to customer request7)Products : precision parts ... Hardening17-4PHSpring SteelC1065, SUS301, SpringAluminumAL1024,AL5052,AL6061,AL6062,AL7075CopperCopper , Brass, BronzePlasticPVC,Bakelite,Derlin, AS Derlin, Acrylic,Anti-Stalic, Acrylic, ...