Compatible replacement for the Lexmark 51B1000 black toner cartridge, delivering up to 2,500 pages. This cartridge is designed for use with Lexmark MS317dn and MX317dn printers. Manufactured with 100% new components, it offers a reliable and economical alternative to expensive OEM cartridges. Using compatible cartridges does not void your printer warranty and is backed by our 100% Quality Satisfaction Guarantee.