refill ink compatible for HP 56/57 ink cartridges

refill inkforHP 56/57 ink cartridges: 1: 100% compatible with OEM inks,can match with the sponges of the OEM cartridges well. 2: The inks have been removed the impurities through 3 filtering system, can ensure the perfect continuity, let nozzles clogging-free3: The inks have passed the extreme conditions tests, have the outstanding stability, can be kept for a long time. 4: The vivid colors of the inks make sure the printouts very similar to OEM, The inks have much better UV,Ozone resistance, canmatch the OEM's . 5: There is no color bleeding among the inks, ensure superb text printing performance at OEM’s level. 6: The cartridges which are filled with inks can also have the good printing performance after a long-term pause, because the inks in the cartridges won’t be crystallized and then won’t block the nozzle. 7: The inks have excellent versatility, can be universally used for HP, Lexmark, Dell cartridges with print head.