26" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 36" OR 36" x 34" duct opening (measured at the opening)

+ Product Details Size – 22"w X 36"h is the size for the duct opening measurement only

85" width X 5

+ Product Details Size - 16"w X 34"h is the size for the duct opening measurement only

26" x 24" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Adjustable Return + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 24" OR 24" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 26. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 23. 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