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Actual Filter Size – 11 3/4"w x 21 3/4" x 1"
8" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover
+ Product Details Size – 14" x 30" or 30" x 14" is the size for the duct opening measurement only
+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 22" OR 22" x 26" duct opening (measured at the opening)
32" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Red Oak Actual Filter Size – 11+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 14" OR 14" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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