76 X 15 X 4 Triangle Back Flange Metal Loft Vent

https://onyxxteriors.com/info/explore/76-X-15-X-4-Triangle-Back-Flange-Metal-Loft-Vent.php

The vent is 76 wide, 15 height and 3.5 inches deep.

The back flange on this triangle was set 1.5 inches back from the face and 2 inches from the back.

Triangle metal loft vents

When a full 3.5 inch vent is needed, but applying stucco, the vent needs to position just right for the stucco depth.