With these Epson ink cartridges, you can refill the ink of your EcoTank printer. EcoTank printers use special ink bottles that allow you to refill the ink tank easily. The shape of each ink bottle is unique and doesn't fit in every printer. Make sure to properly check which printer model you have first, so you always buy the right Epson EcoTank ink cartridge. Don't know which printer model you have? Check the front of the printer or read the manual. With the filters, you can find the suitable ink cartridge for your Epson printer.