Kuretake Fude Brush Pen Extra Fine, Fudegokochi (LS4-10S), 3 pens per Pack (Japan import) [Komainu-Dou Original Package] Line width: about 0.31.5mm Extra-fine type. Nib stiffer. Nib of easy-to-use brush-style Aqueous dye ink. Ink color: Black.