Automatic Vent Opener Greenhouse Windows Opener Auto Vent Opener Temperature Sensitive Paint Spraying Iron Single Spring Vent Opener

【Automatic Vent Opener】Greenhouse windows opener can open and shut your greenhouse window automatically to maintain the best growing temperature and preventing your greenhouse from overheating. 【Wide Applicability】Single spring vent opener can be closed manually and easy to install, fit for most of aluminum frame greenhouse. 【Adjustable Temperature Range】Temperature range is adjustable from 15-25℃ (60-77℉) by turning the cylinder, maximum opening at about 30℃/86℉ (depending on adjustment and load). 【Iron Construction】Durable and rust-proof Iron windows opener with paint spraying for last long time use. 【15lb Load Bearing】Use the Standard Vent Opener to lift up to 7kg / 15 lbs.