MEMBRANE FILTER HOLDER : P-M3 Diameter 25 / 47 mm Buchner funnel of stainless steel Vacuum flask of borosilicate glass Membrane Filter Holder, With Neoprene Lid and Stopper, C-type Handle-clamp. Membrane Filter Holder, With SS Lid with vent, C-type Handle-clamp. Membrane Filter Holder, With Neoprene Lid and Stopper, SS Duck Clamp. Additional Information: Item Code: P-M3