20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black box-shadow: 0 2px 4px rgba(0

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+ Product Details Size – 24" x 24" with 12" collar T-Bar drop ceiling perforated return grill - metal back casing

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

Installation is hassle-free

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

20" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black box-shadow: 0 2px 4px rgba(0+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 15. 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