Automatic Opener for Louvre Window

$100.00

SKU: 17783954161 Category:

Automatic Opener for Louvre Window for Royal or Junior Victorian Greenhouses: the black tube is filled with special parafine oil – which expands when the temperature reached around 72º 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!

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