Bayliss MK7 Automatic Vent Opener
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£ 37.98
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£ 40.53
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£ 40.53
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Product description
- Suitable for opening greenhouse roof windows 76cm x 76cm weighing up to 26lbs
- Designed to open the window automatically when temperatures increase
- Works by wax within the cylinder of the opener expanding when it's hot, pushing a piston to open the window
- When it's cool the wax contracts and stainless steel springs close the window.
- Suitable for aluminium or wooden greenhouses
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