Z4 calls them Battlesuits, but we would call them TAGs.
This is his newest suit, the Satria:
Pendekar:
And finally, his first suit, the Bouncer:
They're roughly the bulk of an Anaconda or Guijia. As soon as I find my Bouncer and Pendekar, I will post a comparison picture with as many Infinity TAGs as I can muster.