36" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Supply Grille Versatility and Durability: The red

Versatility and Durability: The red oak wood not only adds a touch of warmth and softness to your room but can also be sanded and refinished according to your specific application needs

Installation Location – Wall or door mount - door thickness up to 32mm - anodised finish - smooth & beautiful

Actual Filter Size – 7 3/4"w x 9 3/4" x 1"

Carefully shrink wrapped with cardboard backing to prevent damage in shipment

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