oz.
Koh-I-Noor Rapidosketch Technical Pens are remarkably versatile pens that handle like pencils, moving in all directions without snagging or digging into the drawing surface.50 mm.Rapidosketch Technical Pens feature stainless steel nibs and a convenient refillable ink system. The pens? point sizes, ranging in very fine to very broad, are capable of achieving an engraver?s perfection, a loose sketching style, or a finely detailed pointillist technique.