36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter actual front end outer dimensions

actual front end outer dimensions are approximately 18 5/8" width X 8 5/8" height -

+ Product Details Size – 16" x 20" or 20" x 16" is the size for the duct opening measurement only

High Quality Aluminum – The premium durable aluminum will never rust and it will never wear through leaving the material with an elegant

expanding or retracting the gap to meet your precise needs

Actual Filter Size – 29 3/4"w x 15 3/4" x 1"

36" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter return filter actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 14" OR 14" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 75" x 13. 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