34" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter + Product Details Size –

+ Product Details Size – 8"w X 30"h is the size for the duct opening measurement only

but still light and handy

Actual Filter Size – 24 3/4"w x 13 3/4" x 1"

+ Product Details Size – 20"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 9 3/4"w x 25 3/4" x 1"

34" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 22" Or 22" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 21. 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