The Pilot CON-B Squeeze Converter is the reliable refill solution for Pilot and Namiki fountain pens that accept cartridge or converter systems. This squeeze-style converter comes standard with the Pilot Metropolitan and works seamlessly across Pilot's current pen lineup. Filling is straightforward: submerge the nib in ink, squeeze to release trapped air, then slowly release pressure while submerged to draw ink into the reservoir. An essential accessory for fountain pen users seeking sustainable, cost-effective alternatives to disposable cartridges.