Product parameters:
Automatic greenhouse window opener kit with double spring structure, shown in black and silver. The main material is aluminum alloy. Maximum window opening height is approximately 45 cm. The supported window weight is no more than 7 kg or 15 lb. The opening temperature can be adjusted from 16 to 25 degrees Celsius, and full opening occurs at approximately 30 degrees Celsius depending on adjustment and load. Package content includes only 1 automatic window opener kit. Please note that the color may vary slightly due to lighting and screen differences, and a measurement deviation of 1 to 3 cm is allowed.

Core functions:
This greenhouse vent opener is designed for automatic ventilation through the sun's heat sensitivity. It helps open the greenhouse window as the temperature changes, without the need for manual daily adjustment. For proper use, the greenhouse window should open normally before installation. It should not be used at temperatures above 50 degrees Celsius or 122 degrees Fahrenheit. In summer, the black rod should be placed in a refrigerator for at least 5 minutes before installation so that the cylinder can be fully retracted.

Applicable scenarios:
Suitable for greenhouse ventilation in garden and agricultural environments where a roof or window vent opens within the specified weight range. It is intended for users who want temperature-responsive window opening in routine plant cultivation environments. It can be used on greenhouse windows that are compatible with the specified opening height, load limit, and temperature range.

Product summary:
An automatic greenhouse window opener kit made of aluminum alloy with double spring support, heat-sensitive opening control, and a compact black and silver design. It is suitable for temperature-controlled greenhouse ventilation when used within specified load, opening range, and installation conditions.