Decdeal Automatic Greenhouse Vent Opener - Temperature Sensitive Window Opener with Single Spring for Greenhouses, Grow Tents & Garden Sheds

Description: Ingenious temperature-sensitive automatic vent opener can automatically open and close window frame, really works well in maintain the greenhouse within the preferred temperature range. Vent opener starts opening between 15-25℃ (60-77℉), depending on how you have adjusted the cylinder.Specifications: Material: Paint Spraying Iron Color: Black Star open at:：15-25℃ (60-77℉) Fully open at: 30℃/86℉ Max open distance: 45cm/17.71inch Load bearing: 7KG / 15lb Cylinder Length: 33.8cm / 13.3inch Package Size: 38*10*5cm / 14.96*3.93*1.96inch Package Weight: 520g / 1.14lbPackage List: 1 * Automatic Vent Opener 1 * Package of Accessory 1 * Manual (English)Note:Do not heat to more than 50℃(122℉). Do not dismantle the cylinder. Do not apply excessive loads by locking or covering window.