... plated,black,etc 4.flat,pan, etc. types of hinges 1.Surface Finish: annealing, natural anodization, heat treatment, polishing ... to smile to each customer1)Details: Product name types of hinges Material1.Stainless Steel: SS201, SS303, SS304, SS316, SS416, ... C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)4.Bronze: C51000, C52100, C54400, etc5.Iron: 1213, 12L14,12156.Aluminum: ...