BSC***0II laminar flow cabinets work on the vertical flow principle. The air is drawn in through the intake filter situated at the top of the upper section; the air passes via the pressure chamber through the HEPA filter down into the working area. The air flow is 0.*5 m/s /**0%. The air inside the working area is filtered to *9.**5% of 0.5 micron particle. The cabinet is designed for the handling of such material which needs to be handled in a sterile atmosphere.