High-quality aluminum alloy shell, anodized surface for easy cleaning, scratch resistance, corrosion resistance, 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. Turning the hand crank activates the four-way directional valve and transmission rod to open one or more windows. When the windows are wider, two or more chain boxes can be installed.

4. Customizable machine with different opening angles to suit travel schedules

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

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