BAYLISS XL Autovent - full retail package Brand new 2012 stock available for immediate despatch. We usually ship all orders received by 3.00pm the same day. Offered with a manufacturer backed full . Opens greenhouse roof vents as the temperature rises, automaticaly closes as temperature drops. Automatic Greenhouse Window Opener, Simple, Strong & Easy to Fit. Made Entirely in the UK Easy to fit - Screws into wood and clamps onto aluminium greenhouses without the need for drilling.
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