The 936XL 936e Ink Cartridges Combo 4 Pack is a set of replacement ink cartridges designed for use with HP printers. This combo pack includes four cartridges in various colors (black, cyan, magenta, and yellow) and is compatible with models such as the HP OfficeJet 9110/9110B/9120/9120B/9120e/9130. The ink cartridges are water-based and are ideal for inkjet printing. Made in China, this product offers high-quality printing results and is a convenient option for those looking to replace their existing ink cartridges.