Decdeal Greenhouse Windows Opener, Temperature Controlled Automatic Vent Opener with Double Spring

• DOUBLE SPRING: The double spring vent opener can be closed manually.compared with the single spring vent, the double one has stronger thrust force, more solid, and much durable.
• STRONG MATERIAL:Aluminum frame looks more lustrous, durable and rust-proof and stainless steel accessories would last long time use.elongated aluminum cylinder with paint spraying, weather resistant.
• AUTOMATIC VENT OPENER: Solar heat sensitive vent opener, automatic stretch or shrink the vent while the temperature is changing.Maximum opening distance: 45 cm / 18 inches.
• ADJUSTABLE TEMPERATURE:Auto-opening temperature range is adjustable, when the temperature is lower than 15-25°C (60-77°F), the window will automatically close. When the temperature reaches 30°C, the window will open automatically.
• EASY TO INSTALL:universal fit for all aluminum frame greenhouse.suitable for the vents weighting up to 7kg/15lb.

After installed this temperature controlled automatic vent opener, your window will be a self opening one. It is solar heat sensitive that open the vent when weather warms up and then closing when it cools down. Really works well in maintain the greenhouse within the preferred temperature range. Specifications: Material: Aluminum+SS Item Weight: Approx. 376g / 13.26oz Package Weight: Approx. 439g / 15.49oz Package Size: Approx. 38 * 9.5 * 4.5cm / 14.96 * 3.74 * 1.77in Package List: 1 * Vent Opener 1 * Package of Accessory 1 * Manual (English) Note: Do not heat to more than 50℃(122℉). Do not dismantle the cylinder. Cooling the cylinder for 24 hours before installation.