12" x 34" or 34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Design – Easy unrestricted airflow

Design – Easy unrestricted airflow for your HVAC system - 50° angled to provide maximum airflow

+ Product Details Size - 26"w X 4"h is the size for the duct opening measurement only

Some of the best features aren't readily apparent

actual front end outer dimensions are approximately 30 5/8" width X 18 5/8" height

+ Product Details Size – 8" x 14" or 14" x 8" is the size for the duct opening measurement only

12" x 34" or 34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Insulated Line Design – Easy unrestricted airflow+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 34" or 34" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 33. 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