24" deals Plenum Box - 2 Slots - 24" X 3.5 PLENUM BOX 2 SLOTS

Ideal for Texas Buildmart 24" lineal slot diffuser
Galvanized sheet metal Plenum Box with foam insulation.
This Air-distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air.
Total Box Dimensions: B:24"1/8 W:4"5/8 H: 11"7/8
Entry size: deals 8" flex
If you do not have this size flex, you can use a reducer to modify the size.