26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling this grille offers durability and

this grille offers durability and resistance to rust and corrosion

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 8" Or 8" x 34" duct opening (measured at the opening)

+ Product Details Size – 16"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 30" x 32" or 32" x 30" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 26 5/8" width X 8 5/8" height -

26" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Ceiling this grille offers durability and+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 14" OR 14" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 75" x 13. 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