16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Size -

+ Product Details Size - 30"w X 18"h is the size for the duct opening measurement only

Actual Filter Size – 24 3/4"w x 19 3/4" x 1"

Actual Filter Size – 21 3/4"w x 15 3/4" x 1"

+ Product Details Size – 40"w X 20"h is the size for the duct opening measurement only

2" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 14" OR 14" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 13. 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