This is merry from china ,it is our honor to cooperate with you ... years ,if you SpecificationAccording to your requirement.MaterialStainless steel, copper, brass, carbon steel, aluminum (according to customer's requirement.Surface TreatmentZn ... , painting, powdering, color zinc-plated, blue black zinc-plated, rust preventive oil, titanium alloy galvanized, silver plating, plastic, electroplating, ...