Converts plain stem type funnels for vacuum filtration. Provides a combination inlet and vent tube on a single neck vessel. Extends gas inlet or gas dispersion tube into a flask to function as an impinger. Serves as a pressure relief vent when used with addition funnels. Can be used to construct gas washing bottles. Designed to adapt a variety of tubes, condensers and filters in Standard Taper 14/20 and Standard Taper 24/25-24/40 glassware. Diameter variations of 1 to 2mm can be accommodated since the inert o-ring is compressed by the polypropylene cap to effect a vacuum tight seal. The serrated side port can be used for a vacuum connection or for the introduction of gases. Bottom has a Standard Taper inner joint. Body is PTFE, o-rings are Viton, polypropylene compression cap is suitable for use to 150°C, and side port is CTFE.