34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in Actual Filter Size – 35

Actual Filter Size – 35 3/4"w x 23 3/4" x 1"

+ Product Details Size - 16"w X 25"h is the size for the duct opening measurement only

+ Product Details Size - 10"w X 30"h X 2"d (for duct opening measurement only)

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

Experience hassle-free installation and full adjustability for optimal airflow

34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 10in Actual Filter Size – 35+ 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