Quick overview from the supplier:
Print Head QY6-0091-030000 (the following Color ink cartridges:GI-46 B/C/M/Y) for Printers MAXIFY GX3040 MAXIFY GX4040 MAXIFY GX5040 MAXIFY GX5140 MAXIFY GX5540 MAXIFY GX6040 MAXIFY GX6140 MAXIFY GX6540 MAXIFY GX7040 MAXIFY GX7140
