Adapter permits vessels to be purged with an inert gas during sampling or transfer with a AF-0519 cannula. Available with a choice of a 4mm high vacuum glass stopcock having a S.S. constant pressure retention device or a 4mm PTFE stopcock. Both the glass and PTFE stopcock have 9mm OD medium wall arms for use with CG-3022-05 red or CG-3022-22 white septum stopper. Additional arm is provided for connection to inert gas source. Supplied with two CG-3022-05 red septum stopper.