The Genuine HP 27X (C4127X) Black Toner Cartridge is a high-quality, original product designed specifically for HP LaserJet 4000 and 4050 series printers. This laser print technology cartridge comes sealed and brand new, ensuring crisp and professional black prints. Compatible with various HP models, this toner cartridge is an essential component for maintaining the efficiency and performance of your printer. Upgrade your printing experience with this genuine HP product.