34" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter + Product Details Perfect Fit

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

Actual Front End Outer Dimensions Are 16" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

See chart below:

Actual Filter Size – 23 3/4"w x 21 3/4" x 1"

+ Product Details Size – 14" x 28" or 28" x 14" is the size for the duct opening measurement only

34" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter + Product Details Perfect Fit+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 30" Or 30" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 29. 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