The HP 950XL Ink Cartridges are genuine/original cartridges specifically designed for use with HP Officejet Pro 8600 printers. This product comes in a package of 4 cartridges, with each cartridge in black color. The cartridges are compatible with inkjet and laser print technology, ensuring high-quality printing results. With the trusted HP brand and compatibility with HP printers, these ink cartridges are a reliable choice for all your printing needs.