These printers use the T748XL320 cartridge:
Click On a Printer to View it's Cartridges
          Epson WorkForce Pro WF 6090
          Epson WorkForce Pro WF 6090 D2TWC
          Epson WorkForce Pro WF 6090 DTWC
          Epson WorkForce Pro WF 6090 DW
          Epson WorkForce Pro WF 6530
          Epson WorkForce Pro WF 6590
          Epson WorkForce Pro WF 6590 D2TWFC
          Epson WorkForce Pro WF 6590 DTWFC
          Epson WorkForce Pro WF 6590 DWF
          Epson WorkForce Pro WF 8090
          Epson WorkForce Pro WF 8090 D3TWC
          Epson WorkForce Pro WF 8090 DTW
          Epson WorkForce Pro WF 8090 DTw/E
          Epson WorkForce Pro WF 8090 DTWC
          Epson WorkForce Pro WF 8090 DW
          Epson WorkForce Pro WF 8590
          Epson WorkForce Pro WF 8590 D3TWFC
          Epson WorkForce Pro WF 8590 DTWF
          Epson WorkForce Pro WF 8590 DTWFC
          Epson WorkForce Pro WF 8590 DWF