The uni-ball PIN is a fade-resistant and waterproof pigment ink drawing marker. The wide range of PIN nib sizes allows you to create sharp, clean lines and perfect techniques such as dotted shading, crosshatching and shading. The solid, pigment ink line is easy to use for watercolor, as the ink does not smear when wet. The contents of the Tattoo Art 5-piece set include black Pin needle felts in sizes 0.1, 0.2, 0.7, brush felt and 3.0 with cut tip.