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Turn almost any cartridge pen into a bottle filler. The Monteverde MV31083 Ink Mixer Piston Converter fits fountain pens that take long standard international cartridges and adds a clever extra: a small agitator bead that keeps your ink moving.

Key highlights

• Fits: pens that take long standard international cartridges
• Filling: twist knob drives a piston
• Special feature: agitator bead inside the clear chamber
• Capacity: approx. 0.3ml
• Materials: metal and plastic, clear with black accents
• Size: about 66mm long, 6.8mm wide
• Code: MV31083

Why an ink mixer?

In a narrow converter, ink can cling to the walls and form an air bubble that stops it from reaching the nib, especially with saturated or sheening inks. The small bead inside the MV31083 moves as you write or give the pen a gentle tilt, breaking that surface tension so the ink flows evenly to the feed.

How to fill

1. Push the converter firmly onto the pen’s grip section.
2. Dip the nib fully into the ink bottle.
3. Turn the knob to lower the piston, then turn it back to draw ink up.
4. Wipe the nib and section clean, and start writing.

Will it fit my pen?

The MV31083 is made for standard international pens that accept long cartridges. Brands with their own proprietary systems, such as Parker, Pilot, Platinum, Sailor, Lamy or Cross, need their own converters.

Frequently asked questions

How much ink does the Monteverde ink mixer hold?

About 0.3ml per fill.

Can I see the ink level?

Yes, the chamber is clear, so you can watch the ink and the agitator bead.

Is the mixer good for shimmer inks?

The agitator helps keep ink moving, which many writers find useful with heavily saturated inks; always clean the converter regularly.

Monteverde MV31083 Ink Mixer Converter: specifications

• Brand: Monteverde (USA)
• Code: MV31083
• Type: piston converter with agitator
• Fits: standard international (long cartridge) pens
• Capacity: approx. 0.3ml
• Length: about 66mm
• Diameter: about 6.8mm

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