·         Cylindrical funnels have a pressure equalizing line, a PTFE stopcock, and a lower drip tip

·         Graduations to the stopcock are numbered both up and down

·         The 299280 and 299281 series are supplied with an 850400 glass hex-head stopper; the others are supplied without a stopper

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