High quality stay open hinge for window

1. Material:SS304 .SS301 ,SS202  ,SS201 .
2. All rivet joints are spun-riveted with special nylon washers in between for extra smooth action
3. Be suitalbe for UPVC windows and ventilators.
4. Operates normally after 30000 times strict opened/closed.
5. It provides adequate friction at all opening angles.
6. Available for left and right hands.
7. All friction stays are tested to rigorous salt-pray test for protection against corrosive atmospheres.
8. Fine workmanship .Easy to install.

Technical Parameter: