30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Universal Fit – With dimensions

Universal Fit – With dimensions of 4-1/8" wide x 7-1/16" high x 2-1/8"

Marked circles for cutout

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 6" duct openings

+ Product Details Size – 28"w X 34"h is the size for the duct opening measurement only

Its smooth

30" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w24h24 Universal Fit – With dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 6" OR 6" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 8. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 5. 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 Made