Greenhouse Automatic Vent Opener,Greenhouse Window Opener Automatic,Solar Heat Sensitive Vent Opener with Spring,Lifts 7kg/15lb, for Garden Greenhouses,Silver

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. 305g / 10.78oz Package Weight: Approx. 387g / 13.66oz Package Size: Approx. 38 * 9.5 * 4.5cm / 14.96 * 3.74 * 1.77inPackage 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.

• 1.Elongated aluminum cylinder with paint spraying, weather
• 2.Solar heat sensitive vent opener, automatic stretch or shrink the vent while the temperature is changing.
• 3.Stainless steel accessories would last long time use.
• 4.Aluminum frame looks more lustrous, durable and rust-proof.
• 5.Easy to install, universal fit for all aluminum frame greenhouse.