Toner cartridge features an enhanced formula that fuses quickly to documents for crisp text and sharp, black graphics page after page. Energy-efficient design keeps your operating costs at a minimum for increased savings. Easy-to-use design allows simple cartridge replacement for trouble-free use. Toner cartridge is designed for use with HP LaserJet 600 M601n, M601dn, M602n, M602dn, M602x, M603n, M603dn, M603xh; M4555h MFP, M4555f MFP and M4555fskm MFP. Cartridge yields approximately 10,000 pages.