The Pentel PuraMan Tradio was designed for users who like the ‘fountain pen feel,’ but also enjoy the convenience of a typical water-type pen. The tip of the Tradio is very unique, if you look closely you will see this plastic tip is shaped like an arrow. The pen is very smooth and writes a varying line from .4 to .7mm. The Pentel PuraMan Tradio is available in black, blue, or red, and is refillable.