You will also need a different tube for the different needle bars. They are constructed
specifically to work with the type of needle bar and number of needles you intend to
work with. For example, if you're working with a 4-needle shader, then you'll need a 4-
needle shader tube on your tattoo machine.
Same for 5-needle shader, etc.
There are also two sub groups within these groups of tubes (shaders or liners): round tip
and square tip. Each tip has different qualities. For example, the round tip has very little
problem with ink splatter but you might end up with a wider line when turning a sharp
corner if not careful. The square tip is limited in the amount of movement but corners
are usually sharp and defined. With a square tip; however, everything has to be in
Below is a chart outlining round needle gauge sizes, the matching tube size, and the use for that specific needle.