10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 18.5"] Return Grille actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 26 5/8" height -

+ Product Details Size – 30"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 21 5/8" width X 33 5/8" height

with actual outer dimensions of 16

4" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

10" x 16" or 16" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 18.5"] Return Grille actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 16" or 16" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 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