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TWSBI Diamond Mini Fountain Pen



The Mini is the smaller version of the TWSBI Diamond 580. Unlike the Diamond 580, the cap for the Mini threads onto the back of the pen for posting safely without operating the piston.

Simple and elegant, yet completely usable for everyday writing.
Comes with a small vial of silicone grease and a wrench for disassembly.


  • Smoother threads that make removing or putting the cap back on easier
  • Secured screw-on cap to prevent accidental leakage
  • The pen can be completely disassembled for easy cleaning
  • About one inch shorter than the Diamond 580
  • Can easily refill using the TWSBI Diamond 50 Ink Bottle


  • the Diamond Mini AL Silver features a shiny silver-coloured aluminum grip section, cap, and piston rod.