... 3.zinc plated,black,etc 4.flat,pan, etc. types of hinges 1.Surface Finish: annealing, natural anodization, heat treatment ... commit ourself to smile to each customer1)Details: Product name types of hinges Material1.Stainless Steel: SS201, SS303, SS304, SS316, ... : C51000, C52100, C54400, etc5.Iron: 1213, 12L14,12156.Aluminum: Al6061, Al6063 SpecificationM3-M36ColorPlain, blue plated, white plated, yellow ...