This is a compatible Sharp MX-C40NTB black laser toner cartridge designed for use with Sharp MX-C311 and MX-C401 laser printers. It delivers a standard yield of up to 10,000 pages, providing an economical alternative to the original Sharp cartridge. Manufactured with up to 100% new components, this cartridge ensures reliable performance and high-quality printing results. The use of compatible toner cartridges does not void your printer warranty. We offer a 100% Quality Satisfaction Guarantee on our compatible MX-C40NTB toner cartridges.