This metal marker has a 2mm medium tip that provides a smooth and precise writing experience. It uses water-based ink, writes smoothly, and dries quickly, so there is no need to worry about smearing. The ink of this marker is safer and more reliable to use. Whether at home, school, or office, it is an ideal writing tool. Please note that please cap the pen in time after use and place it horizontally to maintain the best writing effect. This metal marker is 5.55 inches long and 1.41 cm in diameter, which is comfortable to hold and easy to carry.