I have the cartridges for Epson DX our appointed 6000. Before we always used original cartridges, due to the price we wanted to try these cartridges. First, I had exchanged color cartridges, which ran without problems. The pressure was fine and we have been glad to have made such a bargain. As the black cartridge was empty then, I wanted to also change. This seemed a bit larger than the others and did not fit perfectly. Prompt then came an error message. After I repeated the process without replacing the cartridge, although no error message was more black but still did not print. Also, the second did not work. I am not a technician and can therefore not say whether the printing problem from these cartridges also comes. The fact is that it occurred after the change for the first time. The dealer has not responded to requests, for this reason alone I would not order these cartridges. In my opinion, I can at least expect an answer from someone with whom I bought something!