12.000 millimeters nominal tubing outside diameter, carton primary container type, 1 primary container unit quantity, 14/20 inner member standard taper joint closure type accommodated and size designation, 1 total primary container quantity, taper ground joint outer member style designator

A fitting having either a ground inner member (male) or a ground outer member (female). Inner member items are used to connect with outer member items in order to obtain a tight joint during laboratory procedures.