The HP 51645A 45 Ink Printer Cartridge in black is a brand new, single unit cartridge designed for use with HP printers. With an expiration date of November 2005, this cartridge is compatible with the HP 51645A model and offers high-quality printing capabilities through its inkjet and laserjet print technology. Ideal for those looking to ensure a reliable and consistent printing experience, this HP cartridge is a dependable choice for producing professional-quality documents and images.