... Powder coated or zinc plated 3 OEM Small order accepted Galvanized steel Side hinge1,used for garage door , sectional door and industrial ... , polish machines...Processed materialSPCC, SGCC, Stainless Steel, Carbon Steel, Mild Steel, Aluminum, Aluminium Alloy etc.Surface treatmentHot galvanized, polishing, chrome/zinc/nickel plating, powder ...