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
New & Genuine Lexmark 50F3H0E Black Toner Cartridge MS310dn MS310d MS312dn MS315 | eBay