24" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 17 3/4" x 1"

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

+ Product Details Size – 10"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 7 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 16" OR 16" x 20" duct opening (measured at the opening)

24" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille Actual Filter Size – 25+ Product Details Perfect Fit & Easy Sizing Designed for a 24" x 30" OR 30" x 24" duct opening (measured at the opening), with actual outer dimensions of 26. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 23. 75" x 29. 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