108 X 78 X 2 Triangle Front Flange Crawlspace Air Vent

https://onyxxteriors.com/info/explore/108-X-78-X-2-Triangle-Front-Flange-Crawlspace-Air-Vent.php

17 pitch triangle attic vent.

Or specifically 17.3 roof pitch by the measures.

108 wide and 78 height.

Procure a

Triangle crawlspace air vents

Made in two pieces since freight doesn't like products this large.