32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set Ideal for Walls & Ceilings:

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

adds an extra layer of protection

+ Product Details Size – 20" x 34" or 34" x 20" is the size for the duct opening measurement only

75"H – fits a 8" X 8" duct opening

One model suits both T-Bar and Drywall installations

32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set Ideal for Walls & Ceilings:+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 12" OR 12" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 11. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum