Bayliss XL Greenhouse Window Opener Garden Watering Solid steel skids at the

Solid steel skids at the base of the legs protect the frame from wear and tear and will take the knocks of thousands of hard landings on concrete

Width: 3ft 11 inches / 120cm

and it will never need treating again

Wooden Base 2ft 9 inches long x 2ft wide x 10 inches high (0

Bayliss XL Greenhouse Window Opener Garden Watering Solid steel skids at theThis Bayliss XL is an extremely reliable automatic vent opener. The opener is activated 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. For roof vents weighing up to 12lbs, approx. 30" x 24" (76cm x 61cm). Can be clamped onto aluminium greenhouses no need for any drilling. If a