MF 3a Pro and MF 5a Pro filter holders with magnetic closure. Can be operated with one hand. MF 3a is graduated to 300 ml and MF 5a to 500 ml. Supplied with lid kit for aseptic filtrations or with tubing from another flask. Vacuum connection on the side of the filter holder. Suction flask not needed. Can be used with many types of flasks, since the vacuum keeps the flask in place. Made of polyphenylsulfone (PPSU) with high chemical resistanse. Sturdy construction. Autoclavable. For 47 mm filters.