· 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