This Vitavia Automatic Roof Vent Opener is filled with wax, when the wax reaches a certain temperature it opens your greenhouse roof vent. Once the wax cools and solidifies the vent closes to keep the heat inside your greenhouse. For Vitavia Greenhouses Only
![Grange Contemporary Vogue Fence Panel](https://www.greenhousestores.co.uk/cdn-cgi/imagedelivery/35BPkBu_iJ1HxzvGkdms_A/shire-fencing-grenge-contemporary-vogue-fence-panel-1-2m.jpg/w=300,h=295,q=85,format=auto,fit=cover)
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Grange Contemporary Vogue Fence Panel
£139