These printers use the 20-090 cartridge:
Click On a Printer to View it's Cartridges

          NEC LCR 50 X
          NEC Superscript 600 Plus
          NEC Superscript 660 Plus
          Sharp Fax FO-4500
          Sharp Fax FO-4550
          Sharp Fax FO-5500
          Sharp Fax FO-5600
          Sharp Fax FO-6500
          Sharp FO 4500
          Sharp FO 5500
          Sharp FO 5600
          Sharp FO 6500
          Sharp FO 6550
          Sharp FO 6600
          Sharp FO 6650
          Sharp FO 7500
          Sharp UX 5000