friction hinge four bar hinge (22mm)

1.Patent No.ZL200420013445.5 2.Raw material: excellent 304 stainless steel 3.10,000 open-close test to make sure durability 4.Quality up to QB/T 3888 standard 5. Multiple specification can be chosen 1.Material (stainless steel):304,2012.Specification:13", 15"3.Adjustable4.Lastest style and standards5.Especially for thesuper-heavy aluminum window and UPVC casement window6.Durable,Beautiful and Safe Technical diagram The features of adjustable positioning friction stay : The adjustable positioning hinges are installed with new-type fixture on the bottom that can adjust the opening angle freely. Itcan effectively prevent the windows from automatic closure due to its own weight or strong win. And it is also suitable for locking the opening hung windows. The products are suitable for ultra-wide, ultra-high, ultra-heavy or hollow glassaluminum alloy and plastic steel of casement window and hung windows.