30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter Multi-shutter damper with easy lever Drop Ceilings / Aluminum The set includes a FG1836 HP-1

Multi-shutter damper with easy lever for precise airflow control

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 12" OR 12" x 28" duct opening (measured at the opening)

Actual Filter Size – 33 3/4"w x 29 3/4" x 1"

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 36" duct opening (measured at the opening)

Upgrade your HVAC system with our cutting-edge 360-degree airflow grill

30" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 6in diameter Multi shutter damper with easy lever Drop Ceilings Aluminum The set includes a FG1836 HP 1 Multi shutter damper with easy lever for precise airflow control + Product Details Perfect Fit & Easy Sizing Designed for a 28" x 12" OR 12" x 28" duct opening (measured at the opening)