Uni-ball Eye Rolling Ball Pen, Extra Fine Point 0.5mm, Black Ink, 3 pens per Pack (Japan import) [Komainu-Dou Original Package] Water base ball-point pen. A reasonable pack. Ink color: Black Ball diameter: 0.5mm It is possible to write vividly clearly. Because the ink spillage of the pen point is constant, the character does not get hoarse to the last.