SAKURA PIGMA MICRON FINELINER PENS, CLASSIC SET OF 6 ASSORTED NIB SIZES, BLACKSizes 005, 01, 02, 03, 04, 05 = 0. 20, 0. 25, 0. 30, 0. 35, 0. 40, 0. 50mm line widths Archival Ink Pens (Black) PO(XSDK 6) eally will be your first choice of pen! Developed by Sakura, they are the first disposable technical pen and are renowned for being an exceptionally reliable pen, credited for its superior ink. The Pi