32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter 9% Pure Copper meeting ASTM

9% Pure Copper meeting ASTM B280 standards

actual front end outer dimensions are approximately 32

+ Product Details Size - 12"w X 18"h X 2"d (for duct opening measurement only)

high-impact plastic

actual front end outer dimensions are approximately 29

32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14in diameter 9% Pure Copper meeting ASTM+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 12" OR 12" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 11. 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