Lexmark MS810dn Black Imaging Unit, Genuine (G2438)
Amazon.com: TCM USA MS310 MS410 MS510 MS610 MICR Alternative Toner Cartridge Works with Lexmark MS310, MS315dn, MS410, MS510, MS610 and Drum MICR Unit. 50F1H00 Toner Cartridge and Drum Unit 50F0Z00 MICR :
How to Replace Your Lexmark MS315dn Imaging Drum Unit - YouTube