1.Material:stainless steel 201,304,316 2.Surface finished:SS,PSS,BP,GP,AB,AC,etc 3.OEM is available stainless steel security door chain ... 1)Material:stainless steel #201/#304/#316/etc.2)Surface Finish:SS ... ,PSS,BP,GP,AB,AC,etc.3)OEM is welcome Advantage Of hinge ...