Description Pack of 2 plastic moulded props with screw holes for use as ventilation props for mini polytunnels. The props are most effective when the polytunnel kit is hinged on a timber raised bed. The prop will achieve a wider ventilation space the closer it is attached to the hinge. If you would like to watch a video showing the prop in situ please click the red 'You Tube' tab on the left hand side of the main image. Reviews Questions
