Kaweco Mini Foldable Ink Converter for Sport Models

Piston converter for compact Kaweco fountain pens. Folding mechanism fits Sport and Liliput models.

Why This Exists

The Kaweco Mini Foldable Ink Converter exists because pocket fountain pens deserve bottled ink. Compact pens like the Sport and Liliput are usually limited to short cartridges — but this clever piston converter changes that.

Made in Germany with a folding piston rod mechanism, the converter holds 0.47ml of ink (same capacity as a standard cartridge) while fitting into even the smallest Kaweco barrels. Fill it with bottled ink, then fold the piston knob down to reduce the converter's length by nearly 20%. The folded position locks, preventing accidental ink expulsion when the pen is closed. It's a simple, elegant solution to a problem that frustrated pocket pen users for years — no more syringe-filling empty cartridges or being limited to cartridge colours.

What Makes It Good

• Folding piston mechanism — reduces length by 20% when filled and folded
• Locks when folded — prevents accidental ink expulsion
• 0.47ml capacity — same as a standard short cartridge
• Fits Sport and Liliput — works in even the smallest Kaweco pens
• Piston-style filling — easy to fill, easy to clean
• Universal compatibility — works with most pocket pens accepting short international cartridges
• Made in Germany — Kaweco engineering and quality

Who This Is For

Perfect for Kaweco Sport and Liliput fountain pen owners who want to use bottled ink instead of cartridges. Also works with other pocket fountain pens that accept short international cartridges.

Specifications

Note: This is the foldable version — not the older non-folding mini converter. Fill the converter with ink, then fold the piston knob down before screwing the pen barrel closed. The converter is a tight fit by design to prevent it working loose. Works with most pocket pens accepting short international cartridges, not just Kaweco models.