Lock in the quality and performance you expect from your HP Officejet Pro X printer with the cartridge it's designed to use. Magenta ink cartridge is designed for high quality and high speeds in Hewlett-Packard Officejet Pro X451dn, Pro X476dn, Pro X551dw and X576dw. Durable, highlighter-resistant, HP pigment inks deliver professional-quality text and graphics and reliability. HP 971XL ink cartridge yields approximately 6,600 pages.