Arealer Automatic Vent Opener Greenhouse Windows Opener Auto Vent Opener Sensitive Spraying Iron Double Spring Vent Opener

[Automatic Vent Opener]Greenhouse windows opener can open and shut your greenhouse window automatically to maintainbest-growing temperature andyour greenhouse from overheating.;[Wide Applicability] vent opener can be closed manually and is easy to install, fit for most aluminum frame greenhouses.;[Adjustable Temperature ]Temperatureis adjustable from 15-25℃ (60-77℉) by turningcylinder, maximum opening at about 30℃/86℉ (depending on adjustment and load).;[High-quality Construction]Durable and rust-proof Iron windows opener with paint spraying for last long time use.;[15lb Load Bearing]UseStandard Vent Opener to lift up to 7kg / 15 lbs.