The TWSBI Diamond Mini Fountain Pen is a piston filler type fountain pen. Simply unscrew the end cap, dip into ink, screw back the end cap, and your done and ready to write! 1 inch shorter than the Diamond 580 Fountain Pen, the mini is roughly the same height as an iPhone when capped and stored away. When the cap is posted it is slightly longer, and the perfect length for writing.
