16" x 24" or 24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Quality Packaging – carefully shrink

Quality Packaging – carefully shrink wrapped with cardboard backing to prevent damage in shipment

+ Product Details Size - 34"w X 36"h is the size for the duct opening measurement only

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

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16" x 24" or 24" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades with Damper Quality Packaging – carefully shrink+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 24" OR 24" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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