30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -

+ Product Details Size - 4"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 12 5/8" width X 20 5/8" height

+ Product Details Size – 18"w X 18"h is the size for the duct opening measurement only

designed to distribute air evenly throughout your space

Installation Location – Sidewall & ceiling

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 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