Staedtler Marsmatic 4 Pen Set Suitable for use on drafting and tracing paper and matt drafting film Triple line width with colour indication according to ISO and DIN resppectively Steady ink flow For use on drafting and tracing paper and on matt drafting film Easy to refill from bottle or with cartridge <a href="https://www.amazon.com/b?node=14770868011"> International products </a> have <a href="https://www.amazon.com/gp/help/customer/display.html/ref=nav_cs_help?ie=UTF8&nodeId=202045290"> separate terms, </a> are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Manufacturer warranty may not apply <a href="https://www.amazon.com/b?node=14770868011">Learn more</a> about Amazon Global Store.