Great for Industrial, Pharmaceutical or University lab use, this table top enclosure features clear polycarbonate panels, and double doors for easy access. The doors are individually framed which allows for easy mounting of safety control switches as well as increases their overall strength. The 2' x 4' HEPA filter features a built-in [fan] speed control. The enclosure mounts to a tabletop via angle mounting gussets. Do you like this design but need to make some changes, please ask? Larger sizes or multiple HEPA's are no problem. Please contact us today!