34" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set + Product Details Size –

+ Product Details Size – 36"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 22"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 14" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

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875" width X 20" height

34" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Set + 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