BUILDMART - 72" Plenum Box for [72" Linear Slot Diffuser - 3 Slot - Triple Slot] Premium Insulated Plenum Box for Heating and CoolingGalvanized sheet metal Plenum Box with foam insulation, ideal for Texas Buildmart 72" lineal slot diffuser. This air distribution box attaches directly to the supply of the HVAC equipment that heats or cools the air. Connects to: 12" flexible duct in oval shape. Can be used and brazed to a 4" or 6" wood stud. If you do not have this size flex, you can use a reducer to modify the size. Professional HVAC Installer is Recommended. Ideal for Texas

Neck: 11 7/8" x 3 1/8" - Face: 13 1/4" x 4 5/8"

ASIN: B085VFH8KC

Mouth Dimensions: L: 35 9/16" W: 1 3/4"

clean lines and architecturally appealing

ASIN: B082MWS14Q

ASIN: B09GPYGTLB

10 x 10 10x10 10x10 10 x 10

12" Linear Slot Diffuser - 1 Slot - Single Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

36 x 16 36x16 16x36 16 x 30

you can use a reducer to modify the size

Neck: 24 1/2" x 23 3/8" - Face: 26 9/16" x 25 3/8"

Ideal for Texas Buildmart 18" Lineal Slot Diffuser - 3 Slot