The Vortex is named for the graceful swirling lines and patterns, like waves along the length of the barrel, that are so skillfully blended in the resin materials. Color, style, value, and convenience are all in this one writing instrument. Fountain pen comes with cartridge or converter ink system, and the German iridium nib point is a medium width. All Libelle Vortex roller ball and ballpoint pens use Schmidt refills, which are made in Germany and are compatible with Parker refills.