This Q-Connect toner cartridge is for use with Lexmark MS510dn, MS610de, MS610dn, MS610dte, MX511de, MX511dhe, MX510de, MX511dte, MX611de, MX611dhe laser printers, and produces high quality, reliable output with every print. This pack contains 1 black toner cartridge with an ultra high print yield of up to 20,000 pages.