This is Three bars position hinge series ,18mm round slot three
bars position hinge ,the slot width is 18mm ,we can produce the
thickness of the bar are 2.0mm,2.5mm,3.0mm or others ,the length
are from 10”to 18”. We always use the stainless steel 304 ,if you
need ,we can use steel or 430. We can produce the window friction
hinge according to your drawing or your sample .