32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Actual Filter Size – 7

Actual Filter Size – 7 3/4"w x 11 3/4" x 1"

Actual Filter Size – 29 3/4"w x 19 3/4" x 1"

+ Product Details Size - 28"w X 36"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 14"h is the size for the duct opening measurement only

32" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10" Diameter Actual Filter Size – 7+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 12" OR 12" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 11. 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