LF 3 and LF 5 filter holders with Spin-lock closure. Can be operated with one hand. LF 3 is graduated to 300 ml and LF 5 to 500 ml. Supplied with lid kit for aseptic filtrations or with tubing from another flask. Stopper for suction flask, manifold or WaterVac pump. Also fits on waste bottle Made of polyesthersulfone (PES). Sturdy construction. Autoclavable. For 47 mm filters.