16" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 15 3/4" x 1"

with actual front end outer dimensions of 6"

actual front end outer dimensions are approximately 32 5/8" width X 22 5/8" height

Premium Airflow Efficiency - High-performance cube core eggcrate design allows 95% airflow efficiency

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16" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 2-Way Deflection Actual Filter Size – 21+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 8" OR 8" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 7. 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