These printers use the 42103001 cartridge:
Click On a Printer to View it's Cartridges
          Okidata B 4100
          Okidata B 4200
          Okidata B 4250
          Okidata B 4250 BLACK
          Okidata B 4300
          Okidata B 4300 N
          Okidata B 4350
          Okidata B 4350 LOW ProFile
          Okidata B 4350 BLACK
          Okidata B 4350 N
          Okidata B 4350 N BLACK