I have tried many different printer systems. Often working with Druckkoepfen which are supplied separately from the cartridges with ink. But this can become clogged very quickly. A repair is then no longer makes sense .. For this reason I have decided to use the cartridge 301. The HP printers with this type of cartridge you just replaced the no longer functioning from cartridge. At the same time one has so changed also the corresponding printhead. Because Tintenbehaelter and printhead are eins.Man then does not need to change all printer, but only the cartridge.