Staedtler Mars Professional Technical Drawing Pen Set or Refills technical drawing pen set

The Mars Professional Technical Drawing Pen combines the classical elements of technical drawing and writing. It features a perfectly designed ink feed system for consistent line width at any angle. The Mars Professional Pen is perfect for sketching, graphic design, and writing. The Mars Professional uses a water-based, fast-drying, acid-free black pigment ink that is smudge-proof, bleed-resistant, lightfast, and permanent. It also has a solid metal-clad, high-tech tip that is suitable for use with templates and rulers. The pen sports an ergonomic grip zone with an integrated roll-stop feature and a safety cap with fine-pitch thread. It's maintenance free, and refill cartridges are easy to exchange in and out of its aluminum-finished pen barrel. The Mars Professional Technical Drawing Pen Set contains a metal pen barrel and four interchangeable points: 0.25mm, 0.35 mm, 0.50 mm, 0.70 mm. Refill system includes new tip. Refills each sold separately. Replacement pen barrel is also available.