These printers use the T786XL320 cartridge:
Epson WorkForce Pro WF-4630
Epson WorkForce Pro WF-4630 DWF
Epson WorkForce Pro WF-4640
Epson WorkForce Pro WF-4640 DTWF
Epson WorkForce Pro WF-5110
Epson WorkForce Pro WF-5110 DW
Epson WorkForce Pro WF-5190
Epson WorkForce Pro WF-5190 DW
Epson WorkForce Pro WF-5620
Epson WorkForce Pro WF-5620 DWF
Epson WorkForce Pro WF-5690
Epson WorkForce Pro WF-5690 DWF
Epson WorkForce Pro WP-4630
Epson WorkForce Pro WP-4630 DWF
Epson WorkForce Pro WP-4640
Epson WorkForce Pro WP-4640 DTWF
Epson WorkForce Pro WP-5110 DW
Epson WorkForce Pro WP-5190 DW
Epson WorkForce Pro WP-5620 DWF
Epson WorkForce Pro WP-5690 DWF