Horizontal laminar flow hood. This is a freestanding unit that meets or exceeds Class 100 requirements set for Federal Standard 209B. The unit will have HEPA filters, a washable and reusable pre-filter, a work surface and side walls of type 304 stainless steel construction, duplex electrical receptacles, high velocity return air slots that provide an air curtain at the work area, work surface and side walls and blowers with an average velocity of 100 fpm. Used for work with non-hazardous materials where clean particle free air is required. 6 foot model, other sizes available.