A ANLEOLFIE Automatic Roof Vent Opener Greenhouse Accessories Solar Window Louvre Thread Opener Up to 30lbs Dual Spring Opener
- Automatic Window Opener Prevent hobby greenhouse overheating.
- Auto Open/Closed.The greenhouse window opener does not consume any power, no batteries or electrical power needed.
- Ideal for your greenhouse window, wall and hobby vents in higher wind situations.
- Starts opening between 59 - 77°F, Replaces manual vent arm.
- Screw directly into polycarbonate panels, wood, or metal frames..