24" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille Actual Filter Size – 27

Actual Filter Size – 27 3/4"w x 35 3/4" x 1"

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 16" OR 16" x 24" duct opening (measured at the opening)

Design – Heavy gauge steel

+ Product Details Size – 30" x 34" or 34" x 30" is the size for the duct opening measurement only

24" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille Actual Filter Size – 27+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 34" OR 34" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 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