16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter but you’ll appreciate the benefits

but you’ll appreciate the benefits over a long period of time

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 6" OR 6" X 16" duct opening (measured at the opening)

+ Product Details Size – 10"w X 20"h is the size for the duct opening measurement only

Works for all Air Conditioning applications including Ductless Mini-Split

16" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 12in diameter but you’ll appreciate the benefits+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 14" OR 14" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 13. 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