36" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIRFLOW - LINEAR BAR GRILLES Custom Louvers you have the freedom to 4 X 12 Is CRFG2028 Width_14in

you have the freedom to effortlessly cut and flare according to your project's unique requirements

Rustproof and built to last in moisture-prone environments

+ Product Details Size - 25"w X 8"h is the size for the duct opening measurement only

Adjustable minimum speed via internal trimpot

Actual Filter Size – 15 3/4"w x 21 3/4" x 1"

36" X 18" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIRFLOW LINEAR BAR GRILLES Custom Louvers you have the freedom to 4 X 12 Is CRFG2028 Width_14in you have the freedom to effortlessly cut and flare according to your project's unique requirements Rustproof and built to last in moisture prone environments