TWSBI Fountain Pen Diamond Mini AL Silver Size:Stub 1.1 Unforgettable Ballpoint Pen in recent Unforgettable Ballpoint Pen in recent times the legendary Ipsilon has been re proposed by Aurora in a version that is virtually identical underlining the prestige of a production run still tied to numerous processes carried out by skilled artisans 15 mm lead pencil with an in built eraser and a rollerball pen to ink permanently on paper READ: The Ultimate TWSBI guide before buying This pen comes with a benchmark ink filling mechanism and has detachable parts so that the user can experience the traditional aspects of owning and using a fountain pen