1. The pen body has a straight liquid structure, and the ink storage amount is large. The lower fiber wicking ink guides the ink to the tip of the pen, the ink has good fluidity, the ink is smooth, and the ink is not easily leaked; 2. The ink inside the pen is clearly visible, round pen and comfortable grip; 3. Carbonized dock beads, reliable and durable, long service life; 4. Quick-drying, not easy to dirty;