16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum + Product Details Size –

+ Product Details Size – 10"w X 18"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 6" duct openings

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

providing comfort and control

85" width X 9

16" x 26" or 26" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Color_Aluminum + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 26" OR 26" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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