The uni-ball PIN is an excellent value drawing pen featuring uni-ball's signature fade proof and water resistant Supër Ink. Uni Pin Finë Linërs can easily be used with watercolors as the ink will not smear when wet. The wide range of nib sizes available in the PIN range means you can create several linë widths making the uni-top essential for creating contrast and is a fantastic addition to your art supplies. The suction is supported and protected by steel which means that PIN drawing pens are long lasting and will not be damaged by use with stencils.