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"] Return Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 11 3/4" x 1"

Looks like new after years of use

+ Product Details Size – 12" x 12" is the size for the duct opening measurement only

Actual Filter Size – 29 3/4"w x 27 3/4" x 1"

Achieve the perfect airflow with adjustable control by rotating the middle disk

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"] Return Actual Filter Size – 17+ 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