12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Copper Coil-Insulated Line Set + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 25" OR 25" x 20" duct opening (measured at the opening)

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 10" duct openings

Key Features:

+ Product Details Size - 12"w X 30"h is the size for the duct opening measurement only

12" x 26" or 26" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Copper Coil-Insulated Line Set + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 12" x 26" or 26" x 12" duct opening (measured at the opening), with actual outer dimensions of 14. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 11. 75" x 25. 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