26" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 Actual Filter Size – 17

Actual Filter Size – 17 3/4"w x 25 3/4" x 1"

No Sharp Surface Edges

+ Product Details Size – 20" x 36" or 36" x 20" is the size for the duct opening measurement only

rotate it to align with the square frame

+ Product Details Size – 30"w X 10"h is the size for the duct opening measurement only

26" x 8" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 Actual Filter Size – 17+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 8" OR 8" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 10. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 7. 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