16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black please note that the total

please note that the total outer dimensions of the grille measure 7" in diameter

high-impact plastic to provide reliable and long-lasting protection for your thermostat

+ Product Details Size – 24"w X 24"h

Weather and Pest Proof – These louvers are especially designed to prevent water from entering your home

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

16" x 30" or 30" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Black please note that the total+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 30" OR 30" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 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