16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter The total outer size of

The total outer size of this grille is the listed size plus 2 and 5/8"

If your hole is 14" wide by 20" tall

+ Product Details Heavy-Duty Steel Construction - Made from 20-gauge steel for superior strength and durability

With Insect Net That Will Prevent Mousquitos and Insects From Entering

actual front end outer dimensions are approximately 12 5/8" width X 18 5/8" height

16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter The total outer size of+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 12" OR 12" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 11. 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