These printers use the 013R00663 cartridge:
Click On a Printer to View it's Cartridges
Xerox-Tektronix Color 550
Xerox-Tektronix Color 560
Xerox-Tektronix Color 570
Xerox-Tektronix Color C-60
Xerox-Tektronix Color C-70
Xerox-Tektronix Color EC-70