22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 13 3/4" x 1"

Actual Filter Size – 21 3/4"w x 11 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 6" OR 6" x 22" duct opening (measured at the opening)

+ Product Details Size – 28"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 20 5/8" width X 38 5/8" height -

22" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 33+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 30" OR 30" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 29. 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