Long and narrow, the dip tube brush was made specifically for cleaning out keg dip tubes. Being long and narrow themselves, dip tubes can be tricky to clean properly without the right tool. Cleaning out a dip tube with a dip tube brush ensures that you scrub the whole inner surface of the dip tube, where bacteria and beer stone can easily hide. These brushes are also good for cleaning sight glasses and other narrow brewing equipment. Another brush highly recommended to anyone who owns a keg!