18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in + Product Details Size -

+ Product Details Size - 12"w X 12"h X 2"d (for duct opening measurement only)

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+ Product Spec Sheet Aluminum Return Grille Spec Sheet

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

85" width X 15

18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 22" OR 22" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 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