HP 901 Black Ink Cartridges print professional-quality documents for a low cost per page. Get laser-quality black text that resists fading and save when you choose an optional high-capacity black cartridge.

Features

Print professional-quality colour at a low cost per page. Save more, using a high-capacity black cartridge. Produce laser-quality text and fade-resistant colour graphics.

Take advantage of simple, trouble-free cartridge management with user-friendly technology that lets you finish a critical print job even when you're low on a specific ink.

Count on HP ink cartridges for consistent, reliable performance. 

Legal disclaimer: HP Toners and Inks sold must be original and manufactured by the brand owners. Please be aware that HP will not honor warranties for any or all counterfeit products or products sold or supplied via unauthorized offline and/or online distribution channels.
HP brand and our affiliates strongly encourage our clients and potential clients to avoid any counterfeit products by all means that are falsely distributed via unauthorized online and/or offline distribution channels. Online offers of supplies are monitored and will be reported to authorities in case evidence of counterfeit or fraud is identified. Any merchant flagged for selling counterfeit HP Cartridges or violating policies against counterfeit sales would have their stores suspended.
Not sure if you have Original HP printing supplies, See here https://www.hp.com/us-en/cartridge/anti-counterfeit.html