The Epson 27 cartridges fit in various Epson WorkForce printers. The list of suitable printers can be found in the product descriptions of the cartridges. You'll know whether your WorkForce printer supports the 27 cartridge line. This saves you a lot of effort before you actually use your printer again. The cartridges are available by the brand Epson, but also by the private label brand Pixeljet. You buy these cartridges separately when you don't need everything or as a combo pack if you prefer to buy everything at once.