Staple sub unit assembly for

HP Stapler Sub Unit 4G3-0939-000CN is a replacement stapler assembly for compatible HP printer finishers. It is intended for servicing the finisher’s stapling mechanism when the subassembly needs replacement.

The assembly includes the stapler unit and its base, as specified in the service documentation. Listed compatible printers include the HP LaserJet Enterprise Flow M830z MFP, Color LaserJet Enterprise Flow M880z MFP, Color LaserJet Enterprise M855dn Printer and LaserJet Enterprise M806dn Printer.