Hmm. Good question. They don't show it on their website anymore. Either get the D4 one Products - NCOM44 Discovery 4 2010 - 2015 kit - NANOCOM Diagnostics (nanocom-diagnostics.com) or buy a GAP id.
The GAP one seems to be the most popular on here and if I was to start out again I reckon that's what I would get.

