... 3.Salt spray test 4.OEM accept Zinc Alloy Faucet Handle:1.Precise and efficient die design, advanced casting & machining equipments.2.Excellent appearance ... , 304, 316, ……Other materialsSurface TreatmentHeat treatmentPlating With Chromate, Nickel, Zinc, Dichromate, etc.AnodizingChemical Film / Conversion CoatingOther Finish as Customer’s Requirement Specialized Design Zinc Alloy Handle Tap