18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 7/8" Insulated Copper Coil Line

7/8" Insulated Copper Coil Line - Seamless Pipe Tube for HVAC

Actual Filter Size – 19 3/4"w x 19 3/4" x 1"

these airflow control components provide you with effortless control over your indoor environment

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall 7/8" Insulated Copper Coil Line+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 20" OR 20" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 22. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 19. 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