LD Compatible Printer Ribbon Cartridge Replacement for Citizen IR-91B (Black, 6-Pack) Color: Black Page Yield: 600,000 characters per cartridge | Shelf Life: 24-36 months per cartridge We offer lightning fast shipping on all printing supply and inkjet photo paper orders The use of compatible cartridges and supplies does not void your printers warranty Our 100% satisfaction and LIFETIME guarantee ensures that you will get exceptional printouts when you buy LD branded ink and toner