16" x 36" or 36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 22" OR 22" X 16" duct opening (measured at the opening)

actual front end outer dimensions are approximately 14 5/8" width X 10 5/8" height

High quality – High quality solid stamped steel with counter-sunk screw holes (screws included) and no sharp edges

75" width X 21

16" x 36" or 36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 36" OR 36" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 35. 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