1.The outside tank adopts the advanced constant pressure technology.With the design protected from the dust and volatility,beautifully shaped,no ink leakage,but breakage-proof . 2.With the newest inner ink cartridge of original version,produced on the basis of design principle and comparable material of original cartridge. 5.With ink or empty is optional 6.A plug and play support allows you to quickly and easily installed,it is convenient to add ink 7.Save your cost 90% because the same ink tanks can be used over and over again
