BUILDMART - 30x20 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: 753 ft3 min Effective Velocity: 9. 8 ft s Neck: 29 1 2" x 19 1 2" Face: 31 1 2" x 21 1 2" This is a Non Filter

12 x 4 12x4 4x12 4 x 12

Neck: 27 5/8" x 5 15/16" - Face: 29 5/8" x 7 7/8"

12 3 Slot White Triple Linear Diffuser

ASIN: B085VFH8KC

CFM: 211 ft3/min - Effective Velocity 9

ASIN: B07N4GGDZ4

ASIN: B09GJVYQF9

ASIN: B09WR67VDB

Neck: 21 9/16" x 7 13/16" - Face: 23 11/16" x 9 13/16"

CFM: 461 ft3/min - Effective Velocity: 9

Texas Buildmart offers Mud In Air Vent Covers also known as Drywall Mud-in White Air Vents

ASIN: B085WJD5NX