These printers use the 810-4 cartridge:

PitneyBowes-Imagistics 9800

PitneyBowes-Imagistics 9800 Series 0

PitneyBowes-Imagistics 9820

PitneyBowes-Imagistics 9830

PitneyBowes-Imagistics 9850

Imagistics 9820

Imagistics 9830

PitneyBowes 9820

PitneyBowes 9830