22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size –

+ Product Details Size – 10" x 22" or 22" x 10" is the size for the duct opening measurement only

75"H – fits a 18" X 4" duct opening

+ Product Details Size – 10"w X 28"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 26 5/8" height

Crafted from robust 20-gauge steel

22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 12" OR 12" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 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