Pentel Ballpoint Pen Vicuna X, 0.5mm, Black Ink(BX105A-A), 3 pens per Pack (Japan Import) [Komainu-Dou Original Package] Knock type Ink color: Black The ball diameter: 0.5mm Smooth oil-based ink. Rotation of the ball is smooth by using the new lubricant to the ink. 3 pens per Pack.