32" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details Size -

+ Product Details Size - 25"w X 12"h is the size for the duct opening measurement only

both individually adjustable

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

our grill boasts an impressive 96% airflow capacity

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

32" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Round Damper Ring + Product Details 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