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

+ Product Details Size – 34"w X 24"h is the size for the duct opening measurement only

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

Aluminum Garage Door Air Vent Grille Register - With Damper Control Lever For Winter & Summer Settings - With Insect Net Prevent Guard [17

Universal Fit – Measures 3-7/8" wide x 3-1/2" high x 3" deep

+ Product Details Size – 36"w X 10"h is the size for the duct opening measurement only

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