Amazon.com: LD Products Compatible Toner Cartridge Replacement for Lexmark 501U 50F1U00 Ultra High Yield (Black) for use in Lexmark MS Series: MS510dn, MS610de, MS610dn, MS610dte, MS610dtn Printers : Office Products
How to Refill Lexmark MS310, MS410, MS510, MS610, MX310, MX410, MX510, Dell B2360, B3460, B3465 - YouTube
CS331/CX331/MC3224/MC3326—Replacing a print cartridge - YouTube