32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Size -

+ Product Details Size - 40"w X 20"h is the size for the duct opening measurement only

providing the flexibility to match specific ventilation requirements or personal comfort levels

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

Measure the size of the air duct/drywall opening

+ Product Details Size – 20"w X 18"h is the size for the duct opening measurement only

32" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Black + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 25. 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