Refill cartridge for fiber pens. Replacement cartridge for the Tradio Stylo fiber pen. Features a flexible plastic nib for customizable line thickness. Capillary system ensures a consistent ink flow. Line thickness: 0.4 mm - 0.7 mm. Detail color: Red. The Pentel Tradio Red cartridge is a refillable design fountain pen equipped with a capillary system. This system provides a steady ink flow, and the flexible plastic tip allows you to achieve various line thicknesses. With this fountain pen, you can take notes or create drawings whenever you like. Innovative and proven writing instruments for everyday use. The company Pentel was founded in 1946 as Japan Stationary Corporation in war-torn Japan, initially focusing on the production of watercolor and oil paints as well as drawing pencils for kindergartens and schools. Numerous achievements in the world of writing and painting products can be attributed to its own research and development laboratory. Examples include the first 0.9 mm fine lead for mechanical pencils, the first fiber pen SignPen, the first ink roller Ball Pentel, and the first correction fluid with a writing tip instead of a brush. For over 70 years, Pentel has continuously worked on innovations and improvements that make our daily lives easier, particularly in writing, drawing, and painting. In 1977, the successful company also entered Switzerland as Pentel Papeteriewaren AG.