2Pcs Greenhouse Auto Vent Opener Cylinder Solar Powered

- [Solar Powered Automatic Cooling] Harnessing sun energy to expand internal wax, this cylinder pushes greenhouse open at 60°F, releasing trapped hot air and preventing plant heat stress, then gently closes as temperatures drop for optimal climate control. - [Easy Swap for Old Cylinders] Designed as a direct replacement for standard greenhouse lift pistons, this 2-pack lets you quickly renew a stuck or weak opener without changing the whole frame, so your roof vents work reliably through the growing season. - [Precision Temperature Response] Engineered to activate between 60°F and 77°F, it maintains ideal daytime conditions while avoiding sudden cold drafts, giving seedlings and mature plants consistent warmth in spring and fall greenhouses. - [Dependable Maintenance-Free Design] No wiring or batteries needed, this mechanical piston operates silently with each daily , reducing the effort of manual propping and making it especially useful for remote garden beds and hobby hoophouses. - [Specifically for Greenhouse Ventilation] A practical upgrade for polycarbonate or glass hobby greenhouses, this vent cylinder fits most standard side and roof openers, helping gardeners maintain air during humid summer afternoons and mild autumn mornings.

Product description

Specifications:

Item Type: Greenhouse Winder Opener Cylinder

Temperature range 15°- 25°/60°-77F

Weight: Approx. 107g

Package:

1 x Greenhouse Winder Opener Cylinder

Notes:

Do not use this opener cylinder anywhere the temperature will exceed 50° (122F).

Do not dismantle the cylinder.

This products need to be refrigerated before use it.

Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.

Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.