... and print spot 4. fill ink convenient Refill cartridgeThe new model refill cartridge with chip, easy to refill inks, protect environment ... .1.Adopt the spongeless structure, avoid to break the printer head because of the cartridge aging. 2.Add two unilateralism ... any environment.3. With different chip can use for many model printer, such as R270, R290,T50, T1100, T10, C79, C91 etc ...