Be Green Ink Compatible Replacement Black Toner Cartridge for Lexmark MS310dn MS312dn MS315dn MS410dn MS415dn MS510dn MS610dn 50F1H00 Black Toner (2 Pack 5,000 High Yield) Ink Cartridges (Aftermarket) - Newegg.com
Black High Yield Toner Cartridge Compatible with Lexmark MS312dn (N0211)
Lexmark MS312dn Printer - JTF Business Systems
Lexmark 50F0Z00 Imaging Unit - JTF Business Systems