Continuous Ink supply system (CISS) for Epson workforce 2630 wf-2630 XP-320 xp-420 XP-424 printers. This set replaces Epson #220 or T220 ink cartridges. This is an empty set. You need to fill it with your own ink, or we also sell the bulk inks that's compatible. We have dye based ink for everyday printing, and pigment sublimation inks for heat transfer to fabrics(t-shirts etc), and Dye sublimation inks for heat transfer to solid surfaces(photo plates, mugs etc). You may never have to buy ink cartridges again. All you have to do is to pour inks into the reservoir tank, and when printer prompts "ink low" or "empty", you press a button located on the ink cartridge to reset the ink level back to full. You just need to set this system up once and that's it. Keep printing non-stop.