The C9345 Ink Maintenance Box stores ink that gets flushed from the system during print head cleaning. Your printer and its software will let you know when the maintenance box needs to be replaced.Compatible Printers: Epson EcoTank L 6550. Epson EcoTank L 6460. Epson EcoTank ET-5800 Series. Epson EcoTank L 8180. Epson EcoTank L 6400 Series. Epson EcoTank L 11160. Epson EcoTank Pro L 15180. Epson EcoTank ET-16150. Epson EcoTank ET-5855. Epson EcoTank L 5150. Epson EcoTank Pro M 15180. Epson EcoTank Pro ET-5800. Epson EcoTank ET-16600. Epson EcoTank ET-8550. Epson EcoTank ET-5800. Epson EcoTank L 15160. Epson EcoTank Pro ET-16600. Epson EcoTank ET-16655. Epson EcoTank ET-8500. Epson WorkForce EC-C 7000. Epson EcoTank ET-8500 Series. Epson WorkForce Pro WF-7800 Series. Epson WorkForce Pro WF-7835 DTWf. Epson EcoTank ET-18100. Epson EcoTank L 15150. Epson WorkForce WF-7830 DTWf. Epson EcoTank L 6500 Series. Epson WorkForce Pro WF-7840 DTWf. Epson EcoTank ET-5880. Epson WorkForce WF-7310 DT