·         Squibb-type with Standard Taper joint and stopcock

·         Plain stem, but may be used with 179800 adapter. (Note stem diameter for a proper fit when using this adapter.)

·         636031 series is supplied without a stopper

·         636030 series is supplied with a glass stopper

·         With an 821001 1:5 taper PTFE stopcock plug

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