Polypropylene Construction, PurairADVANCED Ductless Fume Hood, 49 inch / 1244mm Nominal Width, Includes TRAY-P20, (DWYER Airflow Meter Delete), Standard Depth, AUTOCAL Airflow Display, 230V 50Hz, UK Cord set (unless specified). Requires Minimum Two ASTM-XXX Main Filters and Two Optional ASTS-XXX Safety Filters