... hinge window friction stay1.Spec:8",10",14",16",18",20" to 28"2.Thickness:2.0mm/2.5mm/3.0mm ... SS202#,SS201#,430#,Groove form:Square groove or round grooveGroove with:22mm ,18mm,15mm,13.5mm Length:6",8",10",12 ... ",14",16",18",20",22",24",26",28",30",32",34",36".Bar thickness ... .Packing:2 pcs in a plastic,50pcs in a carton. heavy-duty friction hinge,window friction stay,bar hinge