28" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set Rust-Free Aluminum - Made from

Rust-Free Aluminum - Made from strong

Actual Filter Size – 24 3/4"w x 9 3/4" x 1"

+ Product Details Size - 28"w X 6"h is the size for the duct opening measurement only

[Outer Dimensions: 38

28" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set Rust-Free Aluminum - Made from+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 29. 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 Made from