22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe 75"H – fits a 24"

75"H – fits a 24" X 4" duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 36" or 36" x 12" duct opening (measured at the opening)

10"w X 2"h Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 34"w X 30"h is the size for the duct opening measurement only

High Quality – Rigid aluminum construction with counter-sunk screw holes (screws included) and no sharp edges

22" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe 75"H – fits a 24"+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 8" OR 8" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 7. 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