Replacement cartridge. Refill with a line thickness of 0.35 mm and ball thickness of 0.7 mm. Liquid gel technology, quick-drying. Compatible with all refillable liquid gel products (EnerGel) from Pentel. Color: Light green. Innovative and proven writing instruments for everyday use. The company Pentel was founded in 1946 in war-torn Japan and initially focused on the production of watercolor and oil paints as well as drawing pencils for kindergartens and schools. Many achievements in the writing and painting product world 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 tip 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 been continuously working on new and improved developments that make our daily lives easier, especially in writing, drawing, and painting. In 1977, the successful company also entered Switzerland.