Upgrade your Kaweco Sport or Liliput fountain pen with this compact and versatile plunger-style piston converter. Designed to fit the shortest pens in the Kaweco lineup, its foldable piston mechanism allows it to easily slide into your pen while still providing smooth, efficient ink filling from any bottled ink.

Perfect for writers who love flexibility, it gives your pocket-sized pen the freedom to use a wide range of colors without relying on cartridges. While compact, it draws a sufficient amount of ink for everyday use, letting you enjoy the full Kaweco writing experience on the go.

With its German craftsmanship, durable construction, and clever folding design, the Mini Piston Converter is the ideal companion for your Kaweco Sport or Liliput pen, turning even the smallest pen into a refillable, personalized writing instrument.

Kaweco Mini Piston Foldable Converter for Sport and Liliput Series Specifications

• Ink Capacity: Approx. 0.47 ml of bottled ink
• Length (Folded): ~33 mm (compact for pocket pens)
• Length (Extended): ~52 mm for filling with ink
• Compatiblity: Kaweco Sport series and Liliput fountain pens (fits pens that accept short International standard cartridges)
• Filling Mechanism: Push‑pull piston draws ink directly from the bottle—no cartridges needed
• Made In: Germany