The New Genuine HP 934XL 935 Black Color 4PK Ink Cartridges are specifically designed for use with the OfficeJet Pro 6815 printer. These cartridges are genuine HP products, ensuring high-quality prints and long-lasting performance. With a black color option and a print technology suitable for both inkjet and laser printers, these cartridges provide consistent and reliable results. Additionally, the cartridges have an expiration date of 07/2024, allowing for extended use without worrying about print quality degradation.