34" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 75"H – fits a 18"

75"H – fits a 18" X 18" duct opening

Heat Pump And Centralized Air Ducted Units

Made from high-grade stamped steel

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 6" OR 6" x 28" duct opening (measured at the opening)

+ Product Details Size - 30"w X 14"h is the size for the duct opening measurement only

34" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 75"H – fits a 18"+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 14" Or 14" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 13. 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