Tattoo Pen Refill - 1.6mm Refill - Bag of 10The ORIGINAL Tattoo Pen Refills. Comes in your choice of RED, PURPLE, GREEN, BLUE, BLACK, ORANGE or PINK. This pen is made for writing on skin pre tattoo. If you have ever struggled with pens in the past, with problems 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. 6mm ball point and carrying the best ink money can buy. They are the best