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) - Newegg.com
Amazon.com: LD Products Compatible Toner Cartridge Replacement for Lexmark 501H 50F1H00 High Yield (Black, 2-Pack) for use in Lexmark MS310d MS310dn, MS312dn, MS315dn, MS410d, MS410dn, MS415dn, MS510dn, MS610de : Office Products
Lexmark MS312dn Black High Yield Toner Cartridge, Genuine (G2427)
Lexmark MS312dn MICR laser printer and toner cartridges