TWSBI - VAC Mini Fountain Pen
Piston filler type fountain pen.
Comes in EF, F, M, B, stub1.1
Roughly the same height as an iPhone when capped and stored away
Slightly longer when cap is posted on the pen. (perfect length for writing when cap is posted on the back)
About 1 inch shorter than a Diamond 580 fountain pen.
Please note: Ink is NOT included