20" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter Plain Ends - Gives you

Plain Ends - Gives you the freedom to cut and flare at your own project needs

Filter Size - 21

Actual Filter Size – 13 3/4"w x 19 3/4" x 1"

+ Product Details Size - 14"w X 30"h X 2"d (for duct opening measurement only)

Filter Grille features a user-friendly plastic latch that requires no screwdriver for opening

20" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter Plain Ends - Gives you+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 8" OR 8" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 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