【Environmental protection and energy saving】Not electric, uses solar energy, open or close the ventilation holes of the greenhouse when the temperature rises or falls.
【High Quality Materials】Made of high quality material, durable, solid and comfortable to use.
【Function】When the temperature changes automatically, the best growth temperature will be maintained and the greenhouse will prevent overheating.
【Application】Ideal for your greenhouse window.
【How to use】These products must be cooled before use.
