26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 31 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 30" or 30" x 6" duct opening (measured at the opening)

+ Product Details Size - 26"w X 22"h is the size for the duct opening measurement only

+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]

26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Fixed Blades Actual Filter Size – 17+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 12" OR 12" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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