BUILDMART - 24x20 MUD-IN Air Vent Cover - Drywall Mud-in White Air Vent - Mud Linear Slot Diffuser - Register Grille for Ceiling and Walls - Texas BuildmartOur Standard Linear Slot Diffusers have ASHRAE 70 and ANSI S12. 51 Engineering Certifications Designed and Engineered to the Highest HVAC Industry Standards Commercial Grade Solid Aluminum with Modern Architectural Design This Model can be used in Ceilings and Walls This Model can be used as a Supply Vent Cover and Return Vent Cover CFM: 636 ft3 min Effective Velocity: 9. 8 ft s Neck: 23 11 16" x 19 1 2" Face: 25 5 8" x 21 1 2" This is a Non Filter

Ideal for Texas Buildmart 18" Lineal Slot Diffuser - 2 Slot

16 x 8 16x8 8x16 8 x 16

48" Linear Slot Diffuser - 3 Slot - Triple Slot Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

Total Box Dimensions: L: 72 1/4" W: 6 3/16" H: 12 1/16"

Neck: 29 1/2" x 17 9/16" - Face: 31 1/2" x 19 9/16"

2 Slot - Double Slot - 3/4" Slot Width

Neck: 21 5/8" x 15 5/8" - Face: 23 5/8" x 17 5/8"

24'' X 4 3/4" Linear Slot Plenum Box - For Triple Slot (3 Slot) Linear Diffuser - Texas Buildmart - Modern AC Vent Covers for Ceilings

ASIN: B097BPQF8F

Here's a link to the Plenum Box that fits this Diffuser:

12" 3 Slot White Triple Linear Diffuser

ASIN: B09GPVG6NJ