28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w12h12 actual front end outer dimensions

actual front end outer dimensions are 21

actual front end outer dimensions are approximately 34 5/8" width X 14 5/8" height

+ Product Details Size – 26"w X 10"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 32" OR 32" x 36" duct opening (measured at the opening)

+ Product Details Heavy-Duty Steel Construction - Made from 20-gauge steel for superior durability and reliable performance

28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w12h12 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 16" OR 16" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 15. 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