Standard Taper 10/30 joint at the top of main tube for use with a 75 mm immersion thermometer

·         Designed with a PTFE stopcock on the lower side tube

·         Replacement stopcock plug is 821001-0004

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