Guangzhou Taiyi Hardware Products Co.,Ltd supplies all specifications of friction hinges, with high quality and low price. The length:8", 10", 12", 14",1 6", 18", 20", 22", 24", 28", 32" 36"; The slot width:12mm, 13.5mm, 15mm, 18mm, 20mm, 22mm. Bar thickness:2.0mm, 2.5mm, 3.0mm. Material:stainless steel 430/202/301/304. Friction shoe: brass or nylon. Single point or double point. Both for side hung window and top hung window.