... environment.1.Adopt the spongeless structure, avoid to break the printer head because of the cartridge aging. 2.Add two unilateralism ... of primary struction, make sure not to leak ink, print spot, block the 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 ...