30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 actual front end outer dimensions

actual front end outer dimensions are approximately 35

actual front end outer dimensions are approximately 20 5/8" width X 10 5/8" height

Actual Filter Size – 27 3/4"w x 29 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 10" or 10" x 14" duct opening (measured at the opening)

Built-In Locking System – Comes with a permanently attached eight-tumbler lock and a supplied key for added security

30" x 12" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w30h30 actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 30" x 12" OR 12" x 30" duct opening (measured at the opening), with actual outer dimensions of 32. 5" W x 14. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 29. 75" x 11. 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