... 2.5,3.0mm Square slot:width 22mm or 18mm friction hingeMaterial: stainless steel 201 or304Groove form: roundThickness: 2. ... .5mm/17mmSize: 8 inch---16inchSlot Width: 18.00mmFour bar hinge, Friction hinge, windbreak, friction stay, window hardware, window accessory:: 1) Available in ... 8", 12", 14", 16", 18" and 28"2) Window friction hinge is made of high grade stainless steel3) application scope :UPVC ...