It expands up to 40″ and is used to support an X in a door way. It can also be used to support and Xhaust 2 in the window casing as long as the opening does not exceed 40″.
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Airwall Blox
$149.00 -
Air Splitter
$149.00 -
2 Rings
$19.99 -
Vent Insert
$9.99 -
Plug Insert
$9.99 -
3 Plugs
$24.99