22" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Installing the plaster frame is

Installing the plaster frame is effortless – secure it into your sheetrock

actual front end outer dimensions are approximately 27 5/8" width X 16 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 20" or 20" x 12" duct opening (measured at the opening)

actual front end outer dimensions are approximately 14 5/8" width X 10 5/8" height

making installation a breeze

22" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Installing the plaster frame is+ Product Details Perfect Fit & Easy Sizing Designed for a 22" x 24" OR 24" x 22" duct opening (measured at the opening), with actual outer dimensions of 24. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 21. 75" x 25. 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