- Automatic window opener for greenhouses, brand Tawveml, model MILIFT-29 - Made of aluminum alloy, resistant to corrosion and humid environments - Double spring system provides greater strength and durability - Lifting capacity up to 15 kg and maximum opening height of 40 cm - Easy and quick installation, includes detailed instructions - No electricity required, automatic opening and closing according to ambient temperature - Operating range: 13-34 °C; do not use above 45 °C - Adjustable opening angle to optimize greenhouse ventilation - Essential accessory to improve climate control and plant health in greenhouses