30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 36" Or 36" x 32" duct opening (measured at the opening)

+ Product Details Size - 14"w X 34"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 26" x 36" OR 36" x 26" duct opening (measured at the opening)

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

Its sleek contours bring a touch of modern sophistication to any room

30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 8in + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 18" OR 18" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 20. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 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