34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in + Product Details Size -

+ Product Details Size - 34"w X 10"h is the size for the duct opening measurement only

Performance – High diffusion induction rates result in rapid temperature and velocity equalization of the mixed air mass well above the zone of occupancy

actual front end outer dimensions are approximately 26 5/8" width X 12 5/8" height

Experience hassle-free installation and full adjustability for optimal airflow

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 34" OR 34" x 36" duct opening (measured at the opening)

34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 15. 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