12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper the actual front end outer

the actual front end outer dimensions are 7" in diameter

+ Product Details Size – 34"w X 26"h is the size for the duct opening measurement only

Design – removable door/face for easy filter change & cleaning - uses a 1" thick filter

+ Product Details Size – 25"w X 12"h is the size for the duct opening measurement only

12" x 30" or 30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper the actual front end outer+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 30" or 30" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 29. 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