Lexmark 20K0503 Toner Cartridge black for use with C510. Page yield 5,000. Producing incredible print results every time, this impressive Lexmark black toner cartridge is engineered specifically for use with the C510 printer. It has a substantial page yield of up to 5,000 pages to allow you to handle large print jobs with consummate ease. The high quality ink delivers sharp, bold text and vivid imaging that helps to create stand out, professional looking documents on a consistent basis.