The high capacity Lexmark 70C2XK0 is designed to work in a Lexmark
CS510DTE (and all other compatible printers) to give you the very
best quality prints and unbeatable reliability. This is the result
of years of research and development to produce top quality
components and chemically unique black toner powder produced by
Lexmark themselves specifically for the Lexmark 702XK.
This cartridge is part of the Lexmark Return Program and the
70C2XK0 is cheaper as a result. In exchange for this lower price
the user agrees to return the 702XK cartridge to Lexmark for
refilling once it is empty.