36" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Rigid gauge built for durability

Rigid gauge built for durability and long life in mind

+ Product Details Size - 32"w X 10"h is the size for the duct opening measurement only

Every part is hand inspected for quality before it is packaged

+ Product Details Perfect Fit & Easy Sizing - Designed for a 24" x 10" OR 10" x 24" duct opening (measured at the opening)

Actual Front End Outer Dimensions Are 14" Diameter

36" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Rigid gauge built for durability+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 12" OR 12" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 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