14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10in diameter + Product Details Size –

+ Product Details Size – 32"w X 34"h is the size for the duct opening measurement only

including the ability to mount without removing the thermostat when using the ring base

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 18" OR 18" X 14" duct opening (measured at the opening)

75"H – fits a 24" X 4" duct opening

14" x 26" or 26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 10in diameter + 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