34" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 + Product Details Size -

+ Product Details Size - 28"w X 4"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 22 5/8" height

Actual Filter Size – 27 3/4"w x 25 3/4" x 1"

each diffuser is carefully shrink-wrapped with a sturdy cardboard backing

Every register is carefully packaged with shrink wrap and cardboard backing to ensure it arrives in perfect condition

34" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 6" Or 6" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 5. 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