icateISO9001:2008, ROSH, SGS, CELogisticsUPS, DHL, FedEx, TNTPayment termT/T Main Products Surface Treatment Goldstar offers a variety of finishing services for machined parts, including as the listed table:Black PTEEPassivationWhite ChromeBrushingBlack ChromeHatching knurlingNickel PlatingPlain knurlingElectrolytic Nickel PlatingNitrideWhite ZincGas NitridingBlue Zinc-PlatedHigh-frequencyHeat TreatmentBlack Zinc-PlatedBlack Oxide coatingHard anode oxidationClear anodizeBlack oxidationGreen PTE