12" x 34" or 34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated actual front end outer dimensions

actual front end outer dimensions are approximately 16 5/8" width X 18 5/8" height

the actual front end outer dimensions are 8" in diameter

+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only

+ Product Details Size – 6" x 30" or 30" x 6" is the size for the duct opening measurement only

+ Product Details Size – 10"w X 4"h is the size for the duct opening measurement only

12" x 34" or 34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Powder Coated actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 34" or 34" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 33. 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