34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 19 3/4" x 1"

+ Product Details Outer dimensions: 11

Whether you're updating a single room or renovating an entire space

+ Product Details Size - 30"w X 12"h X 2"d (for duct opening measurement only)

+ Product Details Size – 6" x 10" or 10" x 6" is the size for the duct opening measurement only

34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w20h20 Actual Filter Size – 23+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 15. 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