HP Original LaserJet Toner cartridges with Jet Intelligence produce high-quality business documents. Maintain productivity with easy-to-manage cartridges offered in two sizes, and designed with the environment and security in mind.

• Original HP Toner Cartridges with JetIntelligence are specially engineered for high speed, low-energy performance, and high-quality printing. And, at every step, security is built-in with tamper-resistant chips, firmware, and packaging                             

H P Original LaserJet Toner cartridges with Jet Intelligence produce high-quality business documents. Maintain productivity with easy-to-manage cartridges offered in two sizes, and designed with the environment and security in mind.

Product subgroup: Standard Capacity Toner Cartridges
Print Cartridge/Bottle, Color(s): Black
Page yield (color): Average cartridge yields 3,050 standard pages. Declared yield value in accordance with ISO/IEC 19752.
H P 151 toner cartridge works with:
H P LaserJet Pro 4003, 4103

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