Labconco 3950201 2ft XPert HEPA Filtered Class 1 Balance Vented EnclosureLabconco 3950201 2ft XPert HEPA Filtered Class 1 Balance Vented Enclosure w Guardian Airflow Monitor 120v Has Fluorescent Lighting No UV FULLY TESTED s n 120255033 XPert Filtered Balance Systems provide user protection by keeping powders and particulates contained during weighing procedures. The built in blower and exhaust HEPA filter mounted in the upper plenum take up less space than a separate exhauster would require, and isolation supports