Ink Cartridge

Ink cartridges supply your printer with ink. These usually come in three basic varieties: black, tri-color (which contains cyan, magenta, and yellow), and individual color. They tend to look something like this:

Depending on your printer, replacement cartridges will cost anywhere from $5 to $50. Your cartridge will have to be replaced every time it runs out of ink. Your printer's manual should provide more information about compatible cartridges and how to install them.