... one of the first company to manufacture window friction hinge in China. With the factory ... 18 years, we extend our production to window hardware,door hardware,& furniture hardware.2002, Rongtai Hardware ... window friction hinge / window slide support / Window Handle / Window Accessories,ect.)Door Hardware(Door Lock, Door Handle,Door Stopper,Door Hinge,ect. )Door control Hardware(Glass Door Handle / Door ...