These printers use the T042420 cartridge:
Click On a Printer to View it's Cartridges
          Epson C 82 WN
          Epson CX 5200
          Epson CX 5400
          Epson Stylus C-82
          Epson Stylus C-82 N
          Epson Stylus C-82 WN
          Epson Stylus Cx-5100
          Epson Stylus CX-5200
          Epson Stylus Cx-5300
          Epson Stylus CX-5400