"Pigma Micron Pen, Black 005" from Sakura (Mfr. #XSDK005-49) is a micro fine point marker used in illlustrations, calligraphy, craft projects, memory albums and scrapbooks. Permanent pigment ink suitable for archival applications. Water-based and quick drying on porous surfaces. Fade resistant, waterproof, and chemical resistant. Line width is .20mm.