HP Encoder
C8108-67051
is compatible in the following HP Models:
HP DesignJet 30 Printer series
HP DESIGNJET 30GP PRINTER - C7790F
HP DesignJet 111 Printer series
HP DESIGNJET 111 24-IN PRINTER WITH ROLL - CQ532A
HP DESIGNJET 111 24-IN PRINTER WITH TRAY - CQ533A