On The Run OTR.060 Empty Marker 15 mm
Classic 15 mm flowpen that you fill up yourself. Works great with both ink and thicker paints. The pen itself is made from clear plastic, so that you can easily see both what colour you put in and how much is left. The tip is a 15 mm wide fibertip, that can be changed when needed. Check out all pens and ink from On The Run here.