These printers use the 772-2 Black(2 Pack) cartridge:
Click On a Printer to View it's Cartridges
          PitneyBowes-Imagistics DM 16 K Digital MailING System
          PitneyBowes-Imagistics DM 22 K Digital MailING System
          PitneyBowes-Imagistics DM 22 KR Digital MailING System