CHENGYIDA Set of 7PCS SAKURA PIGMA MICRON FINELINER ARCHIVAL DRAWING PENS - BLACK INK, 7 Size:01-Line: 0.25mm/02-Line: 0.30mm/03-Line: 0.35mm/04-Line: 0.40mm/05-Line Set of 7 - Comprising of 1 of each sizes - 005, 01, 02, 03, 04 05, & 08 Used in illustrations, calligraphy, craft projects, memory albums and scrapbooks. Permanent Pigment Ink Suitable for archival applications. Water-based & quick drying on porous surfaces. Fade resistant, waterproof, chemical resistant.