Uni-Ball Calibrated Bevelled Marker Pen Pin Black 3mm Polyacetal tip. Plastic body (PP). Uni Pin calibrated pens are ideal for professional drawing, artistic drawing and writing, offering a crisp yet smooth stroke. Pigmented ink with high water resistance, which means that once dry it cannot be erased even if water is spilled on the page. It is also highly resistant to light and its colour does not fade even when exposed to direct light. Provides clear and clean lines. The pen has a regular ink supply and is suitable for floor plans, illustrations and more! Thickness: 3 mm Colour: Black Brand: Uni-Ball