... fittings, which achieve different opening styles such as: Fix window, outward opening window, swing window, awning window, and center-pivoted window.3. The addition ... flexible connections ensures the flat installation.4. Width of opening sash from 280mm to 1000mm, Height of sash≤ 1000mm ... dual sealing and ensure the sealing performance, reducing the opening and closing force.9. To assmble the hinges, ...