The GREENBOX Ink Cartridges are compatible with HP printers and include 1 black, 1 cyan, 1 magenta, and 1 yellow cartridge. These cartridges are designed for inkjet print technology and are specifically compatible with HP OfficeJet Pro 6974, 6975, 6978, and 6979 printers. They are also compatible with OfficeJet 6950, 6951, 6954, 6958, and OfficeJet Pro 6958, 6960, 6968, and 6970 printers. The multi-color cartridges offer vibrant and professional-quality printing for various office and personal printing needs. Made in China, these cartridges ensure reliable and consistent performance with your HP printer.