28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return The unique sponge gasket ensures

The unique sponge gasket ensures an airtight seal

actual front end outer dimensions are approximately 32 5/8" width X 36 5/8" height

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

actual front end outer dimensions are approximately 34 5/8" width X 20 5/8" height

14"w X 3"h Is The Size For The Duct Opening Measurement Only

28" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return The unique sponge gasket ensures+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 22" OR 22" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 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