56F0Z00 (Imaging Unit, PC unit, drum)
Lexmark 56F0Z00 Imaging Unit
$79 Free Shipping + toner guarantee + printer guarantee!
Yield = 60,000 pages, relative cost = 1.4 cents per page
Compatible printers: MS421, MS521 Series, MS621dn, MS622de, MX421, MX521, MX522adhe, MX622