18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Universal Fit – Measures 6"

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

10" Circular Round Aluminum HVAC Supply Grille Air Diffuser - With Butterfly Damper - Vent Duct Cover

875" width X 9

actual front end outer dimensions are approximately 36 5/8" width X 10 5/8" height

Actual Front End Outer Dimensions Are 14" Width X 6" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

18" x 20" or 20" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Universal Fit – Measures 6"+ 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