1.Material:stainless steel,iron 2.Guarantee quanlity 3.Different sizes adn finishing 4.20 years experience manufactry DetailsA.Production Name: Single action spring hinge,/stainless steel spring hinge/door hingeB.Material:Stainless steel,brassC.Finishing:Chrome,Satin,Golden ,ect.D.Thickness:2-4 mmE. Nature : 4bbF. Usage : door and windowG.: Loading Capacity:50 kg