· 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