Greenhouse Vent Opener Cylinder Automatic 15°-25°C

- Automatic Temperature Control: Our greenhouse winder opener cylinder automatically adjusts vents when temperatures 15°-25°C (60°-77°F), preventing overheating and maintaining optimal growing conditions without electricity. - Opener Replacement: Directly replaces worn or damaged cylinders on most greenhouse winder systems. Simple screw-on installation restores automatic venting?no tools or technical skills needed. - Solar-Powered: Harnesses solar energy to operate?no wiring, batteries. Durable wax-filled construction ensures reliable, silent performance season after season. - Overheat Protection: Safeguards plants by instantly responding to temperature spikes. Note: Do not expose to temperatures exceeding 50°C (122°F) and refrigerate before initial use. - Universal Fit & Updated Design: Compatible with most greenhouse window vents. Note: New or old version shipped randomly?both guarantee identical performance and durability.