... environment.1.Adopt the spongeless structure, avoid to break the printer head because of the cartridge aging. 2.Add two unilateralism ... , 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. high quality refill cartridge for new model ...