Developer - 6R890 / 6R881 for Xerox® XC810 style

For Xerox® models: XC810, XC811, XC820, XC830, XC855, XC865, XC875, XC1020, XC1033, XC1040, XC1044, XC1045, XC1245, XC1250, XC1255

Carrier material from the Toner Cartridge - Generic 180g. Bottle

The developer should be replaced every other toner refill to play it safe... On this model, reports from the field say that it is not necessary to replace every time.