TTC King of Magnets RGB

Alright, I know a few of us have been waiting for even more HE switches, and these ones in particular because as we all know every RGB adds 5 horsepower. Anyway, these are a decent switch with PC housings and a seemingly unknown stem material? They talk a lot about how this design lets them use different materials for the body and rails of the stem, but then they don't specify which material they actually used as far as I can tell. 

Actuation Force: Adjustable 

Actuation: Adjustable

Bottom Out: 3.4mm