Posca Set of 6 Calibrated Lettering Pens and Lettering Brush Tips Polyacetal tip.  Stroke thickness 0.03 to 1.2 mm.  Plastic body (PP).  Uni Pin calibrated markers are ideal for professional drawing, artistic drawing and writing, offering a sharp and smooth stroke at the same time. Pigmented ink with high water resistance which means that once dry it cannot be erased even if water is spilled on the page, it also has a high resistance to light and its colour does not fade even when exposed to direct light. Contains sizes 0.3, 0.7, 1.2mm and 3 brush tip pens. Brand: Posca