Uni Jetstream Standard Ballpoint Pen, 0.7 mm, Black Ink, Black Body, 6 pens per Pack (Japan import) [Komainu-Dou Original Package] Go to amazon.com Related posts Top recommendation for jetstream pen FeatureThe low ink of writing frictional resistance is carried.Ball diameter: 0.7mmInk color: BlackA reasonable pack. DescriptionThe low ink of writing frictional resistance is carried. Ball diameter: 0.7mm. Ink color: Black. A reasonable pack.