Pilot CON-B Squeeze Ink Converter Guide

Pilot CON-B Squeeze Ink Converter 58 mm fountain pen converter — _{Pilot CON-B Squeeze Ink Converter, a compact 58 mm reusable converter for compatible Pilot and Namiki fountain pens.}

Looking for a piston converter? See the Pilot CON-40 Ink Converter guide. For the larger push-button version, see the Pilot CON-70 Ink Converter guide.

Not sure this is the right converter? Use the Pen Refill Finder to compare converter, cartridge, refill size, format, and compatibility.

Buy the Pilot CON-B Squeeze Ink Converter

The Pilot CON-B Squeeze Ink Converter is a simple reusable converter that uses a flexible internal ink sac and squeeze mechanism rather than a twist piston or push button.

Quick Specs

Specification	Details
Common Name	Pilot CON-B Squeeze Ink Converter
Other Common Names	Pilot CON-B Converter, Pilot Squeeze Converter
Product Type	Fountain pen ink converter
Filling Type	Squeeze / pressure-bar converter
Length	Approximately 58 mm
Ink Capacity	Approximately 0.6 mL
Ink Source	Bottled fountain pen ink
Cartridge Alternative	Pilot Fountain Pen Ink Cartridge
Compatible Brands	Pilot, Namiki
Common Compatible Pens	Many Pilot and Namiki cartridge/converter fountain pens
Key Similar Converters	Pilot CON-40, Pilot CON-70
Proprietary or Standard	Proprietary Pilot/Namiki converter
Reusable?	Yes
Ink Compatibility	Use fountain pen-safe bottled ink only

Pilot CON-B Squeeze Ink Converter Overview

The Pilot CON-B Squeeze Ink Converter is a reusable fountain pen converter for compatible Pilot and Namiki cartridge/converter fountain pens. It lets the pen use bottled fountain pen ink instead of disposable Pilot cartridges.

Unlike the CON-40 and CON-70, the CON-B does not use a visible piston mechanism. Instead, it contains a flexible ink sac surrounded by a metal pressure bar or sleeve. Squeezing the converter compresses the sac, and releasing it creates suction that draws ink through the nib and feed.

The CON-B has long been associated with pens such as the Pilot Metropolitan and remains a simple, compact option for many Pilot fountain pens.

Why Choose the Pilot CON-B Squeeze Ink Converter?

Choose the Pilot CON-B if you prefer a simple converter with few moving parts.

Benefits include:

Simple squeeze filling mechanism
Compact 58 mm length
Reusable bottled-ink filling
Broad Pilot/Namiki compatibility
No threaded piston mechanism
Useful alternative to the CON-40

The CON-B is especially appealing if you prefer simplicity over precise visual control of the piston position.

How the Pilot CON-B Squeeze Mechanism Works

The CON-B contains a flexible internal ink sac. When the metal pressure section is squeezed, the sac is compressed and air is pushed out.

When the pressure is released, the sac expands again and creates suction. With the nib immersed in fountain pen ink, that suction pulls ink through the nib and feed into the converter.

Because the sac is largely enclosed, you cannot see the ink level as clearly as you can with a transparent piston converter such as the CON-40.

Pilot CON-B vs CON-40 vs CON-70

Converter	Mechanism	Approx. Length	Approx. Capacity	Best Use
Pilot CON-B	Squeeze	58 mm	~0.6 mL	Simple, compact filling
Pilot CON-40	Twist piston	60 mm	0.4 mL official capacity	Compact piston converter with visible reservoir
Pilot CON-70 / CON-70N	Push button	80 mm	1.1 mL	Higher ink capacity in pens with enough barrel space

The CON-B and CON-40 are the compact choices. The CON-70 offers much greater ink capacity but is physically longer and only fits pens with enough internal space.

Pilot CON-B vs Pilot Ink Cartridge

Option	Reusable?	Ink Source	Best For
Pilot CON-B	Yes	Bottled fountain pen ink	Reusable filling and more ink choices
Pilot Fountain Pen Ink Cartridge	No	Pre-filled ink	Convenience, travel, quick replacement

Pilot cartridges are cleaner and easier to install. The CON-B gives you access to bottled inks from Pilot and other fountain pen ink manufacturers.

How to Fill the Pilot CON-B Squeeze Ink Converter

Install the CON-B securely into the fountain pen section.
Dip the nib and feed fully into bottled fountain pen ink.
Squeeze the pressure bar or metal sleeve to compress the internal sac.
Release the pressure while keeping the nib submerged.
Allow a few seconds for the sac to expand and draw ink inside.
Repeat the squeeze-and-release process if needed.
Remove the nib from the bottle and wipe away excess ink.
Reassemble the pen.

Use only bottled fountain pen-safe ink.

Compatible Pens

The Pilot CON-B fits many current Pilot and Namiki cartridge/converter fountain pens.

Common examples may include:

Pilot Metropolitan
Pilot Explorer
Pilot Kakuno
Pilot Prera
Pilot Vanishing Point / Capless cartridge-converter versions
Many other compatible Pilot fountain pens
Many Namiki cartridge/converter fountain pens

Compatibility can vary by model, generation, and internal barrel clearance, so confirm your specific pen before ordering.

Compatible Brands

The Pilot CON-B is designed primarily for:

Pilot
Namiki

It uses Pilot’s proprietary cartridge/converter connection and is not a standard international converter.

Alternative Cartridges and Converter Options

Common alternatives include:

Pilot CON-40 Ink Converter — compact twist-piston converter
Pilot CON-70 Ink Converter — larger push-button converter for compatible pens
Pilot Fountain Pen Ink Cartridge — disposable cartridge option
Bottled fountain pen ink — used with the converter

The CON-70 is not a direct substitute in every pen because its 80 mm length requires additional internal barrel space.

Converter Family

The Pilot CON-B belongs to Pilot’s proprietary fountain pen converter family.

It is the squeeze-style option, while the CON-40 uses a rotating piston and the CON-70/CON-70N uses a push-button filling mechanism.

All three use Pilot’s proprietary fountain pen connection rather than the standard international cartridge/converter system.

How to Identify the Pilot CON-B Squeeze Ink Converter

Key identification points include:

Approximately 58 mm long
Metal-covered squeeze section
Flexible internal ink sac
No twist piston knob
No push-button filling mechanism
Proprietary Pilot connection
Reusable with bottled fountain pen ink
Commonly associated with Pilot and Namiki fountain pens

The enclosed squeeze mechanism is the easiest visual clue distinguishing the CON-B from the transparent piston-style CON-40.

Frequently Asked Questions

What is the Pilot CON-B Squeeze Ink Converter?

The Pilot CON-B is a reusable squeeze-style fountain pen converter for compatible Pilot and Namiki fountain pens.

How long is the Pilot CON-B?

The Pilot CON-B Squeeze Ink Converter is approximately 58 mm long.

How much ink does the Pilot CON-B Squeeze Ink Converter hold?

The CON-B holds approximately 0.6 mL of fountain pen ink.

How does the Pilot CON-B work?

Squeezing the converter compresses its internal ink sac. Releasing the pressure while the nib is submerged creates suction and draws ink into the sac.

Is the Pilot CON-B Squeeze Ink Converter reusable?

Yes. It can be repeatedly filled with bottled fountain pen ink.

Does the Pilot CON-B fit the Pilot Metropolitan?

Yes. The CON-B has commonly been supplied with the Pilot Metropolitan, although Pilot has also supplied some Metropolitan pens with the CON-40.

What is the difference between the CON-B and CON-40?

The CON-B uses a squeeze sac, while the CON-40 uses a rotating piston mechanism and transparent reservoir.

What is the difference between the CON-B and CON-70?

The CON-B is shorter and uses a squeeze mechanism. The CON-70 is longer, holds considerably more ink, and uses a push-button filling system.

Is the Pilot CON-B Squeeze Ink Converter standard international?

No. It uses Pilot’s proprietary cartridge/converter connection.

What ink can I use with the Pilot CON-B Squeeze Ink Converter?

Use bottled fountain pen-safe ink only.

As an Amazon Associate, The Pen Bridge may earn from qualifying purchases.