10" x 32" or 32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 34.5"] w16h16 Actual Filter Size – 23

Actual Filter Size – 23 3/4"w x 17 3/4" x 1"

please note that the total outer dimensions of the grille measure 8" in diameter

+ Product Details Size – 8"w X 36"h is the size for the duct opening measurement only

box or other attachments needed

10" x 32" or 32" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter - Aluminum - White [Outer Dimensions: 12.5" X 34.5"] w16h16 Actual Filter Size – 23+ Product Details Perfect Fit & Easy Sizing Designed for a 10" x 32" or 32" x 10" duct opening (measured at the opening), with actual outer dimensions of 12. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 9. 75" x 31. 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