16" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 + Product Details Size –

+ Product Details Size – 6"w X 12"h is the size for the duct opening measurement only

+ Product Details Size – 8"w X 14"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 10 5/8" height

but you will appreciate the benefits over the period of time

16" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 8" OR 8" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 7. 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