Material:iron steel,zinc plated surface. Bar thickness:2.0mm Tack width:19mm Factory will serve you wholeheartedly. Material:iron steelzinc plated surfaceBe suitalbe for UPVC windows and ventilators.Operates normally after 30000 times strict opened/closed.It provides adequate friction at all opening angles.Available for left and right hands.All friction stays are tested to rigorous salt-pray test for protection against corrosive atmospheres.Fine workmanship .Easy to install.Reliability is our strong point..The products are conformes to national technical standard QB/T3888-1999 for <Aluminum Alloy Stainless Steel Window Hinge>. 

Size/inch	Casement Width(C)	Arm  Width(B)	Max.Vent Height	Max.Vent Width	Max.Vent Weight	Bar Thickness	Height	Opening Angle
8	19	16	500	1000	11	2.0±0.2	15±0.5	60°±2°
10	19	16	1000	500	16	2.0±0.2	15±0.5	88°±2°
12	19	16	1100	600	19	2.0±0.2	15±0.5	88°±2°
14	19	16	1150	600	22	2.0±0.2	15±0.5	88°±2°
16	19	16	1200	600	25	2.5±0.2	15±0.5	88°±2°
18	19	16	1200	650	28	2.5±0.2	15±0.5	88°±2°
20	19	16	1200	700	32	2.5±0.2	15.5±0.5	55°±2°
22	19	16	1200	750	32	2.5±0.2	15.5±0.5	55°±2°
24	19	16	1200	750	32	2.5±0.2	15.5±0.5	55°±2°