Royal Victorian Automatic Opener for Roof Window and Side Push Out Window wooden benches Helps regulate temperatures

Helps regulate temperatures

When paired with the roof vent

For indoor/outdoor use (does not leak)

2 Stretcher kit for curtain cable + 126 inch metal cable P

Royal Victorian Automatic Opener for Roof Window and Side Push Out Window wooden benches Helps regulate temperaturesFor Royal or Junior Victorian Greenhouses: the black tube is filled with special paraffin oil which expands when the temperature reached around 72 and the piston will push the window open up to about 14". When temperature falls a heavy spring pulls the window closed. No electricity needed! May also be used on side push out windows. Specifications: Fully automatic no electricity needed! Opens to approx 14" Black color