16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 + Product Details Size –

+ Product Details Size – 30"w X 6"h is the size for the duct opening measurement only

+ Product Details Size – 22"w X 12"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 34" OR 34" X 16" duct opening (measured at the opening)

+ Product Details Size – 15" Wooden Corner Baseboard Grille

actual front end outer dimensions are approximately 27 5/8" width X 26 5/8" height

16" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w25h25 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 6" OR 6" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 5. 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 Made