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corner posts
where there is an upright meeting an horizontal
making it up to 10 times stronger than horticultural glass
8 vents in the Standard Sunbubble and 12 vents in the Large Sunbubble
Measurements
Bayliss MK 7 Vent Opener wooden greenhouses corner postsSuitable for use on nearly all greenhouses this Bayliss MK7 is an extremely reliable, British made, automatic vent opener. The bayliss Mk7 vent opener is operated by a stainless steel cylinder containing a mineral wax which expands with heat; this pushes a piston causing the vent to open. As the temperature falls the wax contracts and a strong stainless steel spring closes the opener. Bayliss guarantee their openers for 2 years but if anything should
