Set of Staedtler Mars Matic 700 S7 Rapidograph Pens. Complete set that includes 7 rapidograph pens, with writing thickness of 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, adapter ring for diabetes and 745 R-9 design ink bottle. Constructed with hard chrome-plated tips for maximum precision. Ink does not dry thanks to the double sealing system in their cap. Stable ink flow thanks to their collector system. Color width indication according to ISO and DIN. Ideal for use on drafting paper and transparencies. Easy to refill from ink bottle or cartridges.