Class II, Type B2, bio safety cabinet. This is a freestanding vertical laminar flow unit. It includes two HEPA filters, one supply and one exhaust zero-probed. The intake velocity averages 105 fpm. It includes an audible alarm to notify the operator of an unsafe window position, an audio-visual alarm to monitor exhaust pressure, type 304 stainless steel construction with side walls slotted for high velocity air return, an exterior of 16 gauge or heavier steel, two grounded key petcocks and a duplex receptacle for grounded plugs. Used for low to moderate risk biological agents treated with toxic chemicals and radio-nucleotides. 4 foot model presented, other sizes are available.