36" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black Carefully Shrink Wrapped With Cardboard

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

+ Product Details Size - 22"w X 8"h is the size for the duct opening measurement only

sized to fit into all drop ceiling system

Actual Filter Size – 31 3/4"w x 31 3/4" x 1"

+ Product Details Size – 28" x 28" is the size for the duct opening measurement only

36" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black Carefully Shrink Wrapped With Cardboard+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 28" OR 28" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 27. 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