30" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Grille + Product Details Size –

+ Product Details Size – 20"w X 6"h is the size for the duct opening measurement only

while the included installation screws make setup quick and hassle-free

Actual Front End Outer Dimensions Are 34" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

Actual Filter Size – 7 3/4"w x 23 3/4" x 1"

actual front end outer dimensions are approximately 27 5/8" width X 20 5/8" height

30" x 10" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Grille + Product Details Size –+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 10" OR 10" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 12. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 9. 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