TWSBI Diamond 580 fountain pen

The TWSBI Diamond Mini is a pocket fountain pen that uses a piston filling system. Like many other TWSBI fountain pens, it has a crystal-clear acrylic body, allowing the ink level to be visible. Due to the piston filling system, the small fountain pen has a high ink capacity (1.3ml). The pen is finished with silver and purple accents and a stainless steel nib.

TWSBI considers it important that the user can disassemble and reassemble the pen as this helps the user understand the full principle of a fountain pen. These pens are supplied with a wrench and silicone grease. None of these accessories are intended for immediate use, as they are meant for long-term care and maintenance.

Instructions are included with each pen. Please note that this is intended for experienced users only and is not necessary for normal use of the pen.