1 X 18 X 36 Inch, 30 to 40 Inch Filter Length, 1512 mL of 37% Formalin Adsorption Volume, 10% (1.33 lbs.) Adsorption Weight, Exhaust Filter Flow Type, 4 Foot Enclosure Nominal Width, Carbon Filter Type, Formaldehyde-Formalin Filter Application, 14 lbs. Weight