14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe this 4-way air vent diffuser

this 4-way air vent diffuser allows you to precisely control airflow

75"H – fits a 18" X 4" duct opening

The total outer size of this grille is the listed size plus 3"

Filter Size - 19

you have 16 different varieties to choose from

14" x 16" or 16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Round Duct Pipe this 4-way air vent diffuser+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 16" OR 16" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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