... ink convenient Refill cartridgeThe new model refill cartridge with chip, easy to refill inks, protect ... break the printer head because of the cartridge aging. 2.Add two unilateralism valve on ... printer head when printing in any environment.3. With different chip can use for many model printer, ... such as R270, R290,T50, T1100, T10, C79, C91 etc. high quality refill cartridge for ...