34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" 16" Circular Round Aluminum HVAC

16" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

actual front end outer dimensions are approximately 12 5/8" width X 30 5/8" height

+ Product Details Size - 20"w X 14"h is the size for the duct opening measurement only

height: 22px

34" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" 16" Circular Round Aluminum HVAC+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 12" Or 12" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 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