These printers use the 823-4 cartridge:

PitneyBowes-Imagistics 3500

PitneyBowes-Imagistics 3500 MFP

PitneyBowes-Imagistics 5000

PitneyBowes-Imagistics 5000 MFP

PitneyBowes-Imagistics DL 170

Imagistics DL 170

NCR 5000

Tally-Genicom 3500