The photos in the Industrial Series support articles depict both the original A3016 (below left) and the updated A3648 extruders (below right). The A3648 is installed in all Gen 2 Industrial Series printers by default (see Note on Hardware Differences, below). It can also be installed in Gen 1 Industrial Series printers, a process which requires some minor rewiring. Differences in service procedures are noted in the text.
Note on Hardware Differences
Markforged Gen 2 composite printers can be identified by the large updated product label on the back panel.