Product name: window hinge 1.size::8 ,10,14,16,18,20inch 2.thickness:2.0mm/2.5mm/3.0mm 3.material:SS304/SS301/SS201/steel Window hinge 1.size: 8 ,10,14,16,18,20 ,22inch2.thickness:2.0mm/2.5mm/3.0mm 3.material:SS304/SS301/SS201/steel19mm round groove window hingeused for side hung window.can be in normal use after 50000 times switching test.material: S.S304/301/202/201can be in normal use after ...