18" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe and are ready to go

and are ready to go for the next job

Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

Plain Ends - Gives you the freedom to cut and flare at your own project needs

Its removable face allows hassle-free cleaning

actual front end outer dimensions are approximately 32 5/8" width X 8 5/8" height -

18" x 36" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 8" Round Duct Pipe and are ready to go+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 36" OR 36" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 38. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 35. 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