16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" while the ingenious dial-controlled damper

while the ingenious dial-controlled damper empowers you to effortlessly regulate airflow using your foot

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 16" OR 16" X 14" duct opening (measured at the opening)

+ Product Details Outer dimensions: 25

Actual Filter Size – 25 3/4"w x 33 3/4" x 1"

actual front end outer dimensions are 19" Width X 19" Height

16" x 34" or 34" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 8" while the ingenious dial-controlled damper+ Product Details Perfect Fit & Easy Sizing Designed for a 16" x 34" OR 34" X 16" duct opening (measured at the opening), with actual outer dimensions of 18. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 15. 75" x 33. 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