Solar Vent Opener

Solar powered vent opener automatically opens most vents Are you wondering who is going to take care of your greenhouse when you can't be there? Even in the winter, your greenhouse gets hot on a sunny day. •Regulate the temperature in your greenhouse. •The parafin wax in the piston expands to open your vent automatically as the temperature changes. •Environmentally friendly, no electricity or batteries needed. •Extends 12" to open and close greenhouse vents. •Fits most greenhouse vents, including the Early Bloomer greenhouse. •Installs easily and supports up to 15 lbs.