26" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter rg1010 /* more inner breathing room

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

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

75" width X 5

+ Product Details Size - 24"w X 28"h is the size for the duct opening measurement only

26" x 22" Cube Core Eggcrate Return Air Filter Grille for 1" Filter rg1010 /* more inner breathing room+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 22" OR 22" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 21. 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