This is a compatible Sharp MX-51NTMA magenta laser toner cartridge designed to work with your Sharp laser printer. It replaces the original Sharp MX-51NTMA toner cartridge and delivers a standard yield of up to 18,000 pages. Manufactured with 100% new components, this cartridge provides a reliable and economical alternative to expensive OEM options. The use of compatible toner cartridges does not void your printer's warranty. We offer a 100% Quality Satisfaction Guarantee on our compatible MX-51NTMA toner cartridges.