High-quality aluminum alloy housing, anodized surface treatment for easy cleaning, scratch-resistant, anti-oxidation, and exquisite appearance.

2. The chain features a double-layer metal link design for enhanced stability and smooth operation. Pull-push force: 300-500N.

3. Turn the hand crank to engage the four-way directional valve and drive rod, which opens a single or multiple windows. When the window is wide, it can accommodate two or more sprocket boxes.

4. Machines with customizable opening angles based on itinerary

5. Suitable for opening small, medium, and large top, middle, and bottom hung windows, skylights, inward-tilting windows, and outward-tilting windows on wall facades.

6. Appearance color: Sparkling Silver; customizable according to customer requirements.