Aluminum alloy housing with anodized surface treatment, resistant to dirt, scratches, and oxidation, offering a fine appearance.

The chain features a double-layer metal link design for enhanced stability and smooth operation. The pulling force ranges from 300 to 500N.

Turn the hand crank to operate the four-way directional valve and drive rod, which opens one or more windows. When the windows are wider, two or more chain boxes can be installed.

Customizable machine with different opening angles based on itinerary

Suitable for opening small, medium, and large wall sash windows, skylights, inward-tilting windows, and outward-tilting windows.

The appearance color is brushed silver; customizable according to customer requirements.