14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size –

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

+ Product Spec Sheet Round Ceiling Diffuser Spec Sheet

The powder-coated finish ensures a sleek look while protecting the grille from wear and tear

Every grille has a front end frame that will overlap at the wall joint

featuring a 8" round duct opening

14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 26" OR 26" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 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