32" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring 10" Diameter Is The Size

10" Diameter Is The Size For The Duct Opening Measurement Only

+ Product Details Size – 18"w X 10"h is the size for the duct opening measurement only

+ Product Details Size – 10"w X 14"h is the size for the duct opening measurement only

Made of High Quality Aluminum That Will Never Rust

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening)

32" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring 10" Diameter Is The Size+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 34" Or 34" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 33. 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