12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 18.5"] 10" Diameter Actual Filter Size – 7

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

+ Product Details Size – 24"w X 24"h

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

Actual Filter Size – 17 3/4"w x 21 3/4" x 1"

12" x 16" or 16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 14.5" X 18.5"] 10" Diameter Actual Filter Size – 7+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 16" or 16" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 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