HP 27X (C4127X) Black High Yield Original LaserJet Toner Cartridge Color: Black Original HP Cartridge Yield (approx): 10,000 pages Maximum convenience at a lower cost per page for high-volume users HP Ultraprecise cartridges set the standard for optimum quality output What's in the Box: New Original HP (genuine) toner cartridge HP Printer compatibility: HP LaserJet 4000, 4050