This Sign Pen features an incredibly fine brush tip great for a variety of techniques including feathering, cross-hatching, calligraphy, detailed line work and outlining. Brush tip wipes clean with a paper towel and will not dry out if left uncapped. The micro brush tip is ideal for drawing, detailing, lettering, and journaling. The special water-soluble ink always flows evenly and guarantees the smoothest writing possible.Details: Available in multiple colors Water-based dye ink Durable tip produces brush-like strokes ACMI certified