... ,window hardware,four bar hinge,hinge,window accessory,window fitting,handleMaterial:SS304#,SS301#, SS202#,SS201#,430#,Groove form:Square groove or round ... ",18",20",22",24",26",28",30",32",34",36".Bar thickness:2.0mm,2.5mm,3.0mm.Opening angle:55 ... in a carton. heavy-duty friction hinge,window friction stay,bar hinge