Two different strokes available in the same fiber-pen! Toy Color Doppiobello have a thin tip (2 mm) on one side and a larger conical tip (4,5 mm) on the other side. Fixed tips. The water-based ink guarantees high washability from the skin with water and soap, and from most of the textiles through a 40° washing cycle. Safety ventilated cap, that allows air to flow if the cap edge lays against the windpipe.