BHC-1300IIA/B3 Clean Biological Safety Cabinet Clean biological safety cabinet is necessary in animalcule lab, especially in the condition needing protection measure, such as medicine, pharmacy, scientific research and so on. BHC-1300IIA/B3 Clean Biological Safety Cabinet's main characters 1 Air insulation design to avoid cross pollution inside and outside,Constant airflow 100% emissions, vertical laminar negative pressure 2 Equipped with spring up/down movable door in the front and back of work bench, flexible and convenient to locate 3 Equipped with special filter on ventilation to keep vented air conforming to national standard. 4 Contact switch adjusts voltage to keep wind speed in working area in ideal state all the time. 5 Operate with LED panel. 6 The material of the work area is 304 stainless steel.