These printers use the 42127401 cartridge:
Click On a Printer to View it's Cartridges
          Okidata C 5100 N
          Okidata C 5150 N
          Okidata C 5200
          Okidata C 5200 N
          Okidata C 5300 N
          Okidata C 5400
          Okidata C 5400 DN
          Okidata C 5400 DTN
          Okidata C 5400 N
          Okidata C 5400 TN
          Okidata C 5510 MFP
          Okidata C 5510 N
          Okidata C 5510 N MFP