The HP21 Twin pack C9508FN Black Ink Cartridges are genuine HP products in new, never-used condition. These single unit cartridges are designed for use with HP printers, featuring a print technology of Inkjet for high-quality black printing. With an expiration date of 7/2013, these cartridges are compatible with various HP models and provide reliable performance for your printing needs. Upgrade your printing experience with this convenient twin pack of black ink cartridges from HP.