·         Standard Taper 14/20 joints

·         Squibb-type funnel with a PTFE stopcock plug with a 2 mm bore

·         Plug is 821001-0002

·         Hex-head stopper is included with 298280

·         Series 298281 is supplied without stoppers

·         Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements