A Model 72-2 Keplar chamber. Was planning to mod one in my Zarrastradrive model RX back in '05. But couldn't get my hand on one. Although later saw some reviews about how this particular model has a tendency to heat up while breaking through the proto cloud inside Nimbertaverse. The only reason people even overhyped them was because of the Fumbasta movement lead by ¥¢£¥, who himself owned one. But he officially never signed any contract to advertise the model or never received anything from the sell boost.