Microscale, thin-wall reaction vial with outer joint externally threaded at opening to allow an O-RING-CAP-SEAL ground glass connection similar to 9590. Major difference is this thin-walled vial has better heat transfer for the more demanding research project. Supplied with threaded cap with hole, one PTFE faced silicone rubber septum and one O-ring. Available with externally threaded side port which is also supplied with cap, septum, and O-ring.