Lexmark CS310, CS/CX410, 510 Black Return Program 4K Toner Cartridge
Amazon.com : Lexmark 70C1HK0 High Yield Black with 70C10C0, 70C10M0, 70C10Y0 Standard Yield Color Toner Cartridge Set - Lexmark CS410dn : Office Products
How to refill your Lexmark CS310dn, CS410dn, CS410dnw, CS510de, CS510dew and related laser printers - YouTube