{"product_id":"2pcs-greenhouse-auto-vent-opener-cylinder-solar-powered","title":"2Pcs Greenhouse Auto Vent Opener Cylinder Solar Powered","description":"\u003cp\u003e- [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.\n- [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.\n- [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.\n- [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.\n- [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.\n\u003c\/p\u003e\u003cp\u003eProduct description\u003c\/p\u003e\u003cp\u003eSpecifications:\u003c\/p\u003e\u003cp\u003eItem Type: Greenhouse Winder Opener Cylinder\u003c\/p\u003e\u003cp\u003eTemperature range 15°- 25°\/60°-77F\u003c\/p\u003e\u003cp\u003eWeight: Approx. 107g\u003c\/p\u003e\u003cp\u003ePackage:\u003c\/p\u003e\u003cp\u003e1 x Greenhouse Winder Opener Cylinder\u003c\/p\u003e\u003cp\u003eNotes:\u003c\/p\u003e\u003cp\u003eDo not use this opener cylinder anywhere the temperature will exceed 50° (122F).\u003c\/p\u003e\u003cp\u003eDo not dismantle the cylinder.\u003c\/p\u003e\u003cp\u003eThis products need to be refrigerated before use it.\u003c\/p\u003e\u003cp\u003eMonitors 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.\u003c\/p\u003e\u003cp\u003ePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.\u003c\/p\u003e","brand":"GreenCampGear","offers":[{"title":"Default Title","offer_id":53883166785901,"sku":"B0DFR5NJ82","price":61.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1024\/5875\/3389\/files\/41vFtExtQZL._AC_SX679.jpg?v=1788562265","url":"https:\/\/greencampgear.com\/products\/2pcs-greenhouse-auto-vent-opener-cylinder-solar-powered","provider":"GreenCampGear","version":"1.0","type":"link"}