16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter Whether you're updating a single

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

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

With Insect Net That Will Prevent Mousquitos and Insects From Entering

actual front end outer dimensions are approximately 30 5/8" width X 36 5/8" height

If your hole is 14" wide by 20" tall

16" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter Whether you're updating a single+ 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