we are manufacture window fitting 4 bar hinge 1.Length:8"- 36" 2.Solt ... 3.Bar thickness:2.0mm,2.5mm,3.0mm window fitting 4 bar hinge description www.huizheng.net1).Window friction ... Style available a.slot form: square b.slot width:18mm,bar width16mm,17mm c.bar thickness:2.0mm,2.5mm ... degree4).Size:6- 405)materials:SS430#,SS202#,SS304# window fitting,pvc window accessory,window hinge,pvc window hardware