32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -

+ Product Details Size - 16"w X 6"h is the size for the duct opening measurement only

10" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

40"w X 16"h Is The Size For The Duct Opening Measurement Only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 12" x 36" or 36" x 12" duct opening (measured at the opening)

+ Product Details Size - 16"w X 25"h is the size for the duct opening measurement only

32" x 32" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return grille + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 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 Made from