-Efficient Operation: Powered by a filled cylinder, this auto vent opener requires no batteries or electricity, offering a cost-effective and eco-friendly solution to regulate your greenhouse environment. Adaptable to Various Climates: Efficiently operates within a temperature range of 15°C to 25°C (60°F - 77°F), achieving full opening at 30°C (86°F) to enhance air circulation with a maximum vent distance of 18'' (45cm). Construction: Made from robust iron and stainless steel, the window opener is built to endure the harsh conditions of greenhouse settings, providing reliable service and as a gardening essential. Temperature Responsive Mechanism: This automatic greenhouse window opener features a temperature-sensitive design that adjusts the venting based on internal temperatures, ensuring optimal climate control without the need for electrical power. Simple Installation and Universal Fit: Comes with all necessary hardware for quick setup. Compatible with most greenhouse and roof vents, this tool integrates easily into various greenhouse designs., Weight: 1.0582188576 pounds, Manufacturer: Xnuiasqe