One ink cartridge can yield more than 18,000,000 characters · No maintenance, no service, no PM's · See Ink Report below: Ink Report: Print 900,000+ characters at 12.7 mm or 1/2" tall character height Print 3,600,000+ characters at 6.35 mm or 1/4" tall character height Print 9,000,000+ characters at 3.175 mm or 1/8" tall character height Print 18,000,000+ characters at 2.54 mm or 1/10" tall character height