This model is suitable to Hp k550/k850 which are sold in North America, South America, Europe, etc. Features: 1) Vivid and High quality output and high stability with low price. 2) Quick installation and simple to use. 3) No clogging, No leaking. 4) Inktank is thick and hard. Each unit contains: A) Reservoir bottles with tube. B) CISS inner cartridge with AR chip. C) Support arm & air filter, seal plug, and all necessary small parts. D)pack by color or white neutral box. White or color box
