12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter high-impact plastic to provide reliable

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

+ Product Details Size – 6" round duct opening-

Example: If your hole is 20" wide by 14" tall

75"H – fits a 18" X 6" duct opening

actual front end outer dimensions are approximately 10 5/8" width X 8 5/8" height

12" x 22" or 22" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8in diameter high-impact plastic to provide reliable+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 22" or 22" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 21. 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