26" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter Actual Filter Size – 19

Actual Filter Size – 19 3/4"w x 13 3/4" x 1"

For 14" Round Duct Opening - Spiral or Flex

+ Product Details Size – 34"w X 12"h is the size for the duct opening measurement only

+ Product Details Size - 8"w X 28"h is the size for the duct opening measurement only

Actual Filter Size – 27 3/4"w x 17 3/4" x 1"

26" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6" Diameter Actual Filter Size – 19+ Product Details Perfect Fit & Easy Sizing Designed for a 26" x 30" OR 30" x 26" duct opening (measured at the opening), with actual outer dimensions of 28. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 25. 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