Piston filler demonstrators are attractive clear pens that let you fill and empty using a piston device. This keeps your hands clean, lets you switch inks quickly and keep an eye on your remaining ink volume. They get their name "demonstrator" because they demonstrate the inner workings of a fountain pen.

  • Provide a large ink capacity
  • Crystal clear
  • Piston filling mechanism
  • Configured for popular drawing and writing nibs 
  • Measures 5.25" uncapped, 5.5" capped