14" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 each available in a variety

each available in a variety of high-quality materials like brushed nickel

+ Product Details Size - 36"w X 18"h is the size for the duct opening measurement only

With a 5" diameter for the duct opening measurement

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

14" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w26h26 each available in a variety+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 30" OR 30" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 29. 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