The ORIGINAL Tattoo Pen Refills in a FINE LINE 1.0mm. The FINE LINE tattoo pen is still made with a large enough ball point to write on skin well, but small enough for specific jobs that require a smaller line. Comes in your choice of RED, BLUE. This pen is made for writing on skin pre-tattoo. If you have ever struggled with pens in the past like I have, such as clogging, disappearing while tattooing, or vague and inconsistent lines, then you will LOVE the Tattoo Pen. It is a solid brass housing holding a 1.0mm ball point and carrying the best ink money can buy. They are the best quality of pens available for drawing a stencil on skin, but cheap enough to be single use and disposable for health standards and sterility.