G-More Greenhouse Automatic Window Opener Automatic Vent Opener with Double Spring Solar Vent Roof Opener Replacement Cylinder Temperature Control, with Solar Power Sensor (Window Vent Opener)

AUTO WINDOW OPENER–As the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating.
DOUBLE SPRING–Double spring mechanism protects against wind gusts. The Automatic vent opener is appropriated for most of the current garden greenhouses.
PREMIUM QUALITY–The window opener is made of high quality aluminum alloy. Durable and rust resistant in damp environments Long service life.
EASY TO INSTALL– We have attached an Installation manual, and there is video in listing for your reference. There is two ways to install: 1. Clamps to greenhouse bars, no drilling needed. 2. Screw directly into polycarbonate panels, wood, or metal frames.
MAXIMUM OPENING–Approx. 30°. Maximum window opening: 45 cm. lift up to 15lbs. If you have any questions, please don’t hesitate to contact us.