Pilot Fountain Pen Ink Cartridges feature a proprietary design that delivers precise ink flow through a 12-pack of either rich Black or Blue liquid ink. Each cartridge contains 0.9ml of Pilot's specially formulated ink that flows at a consistent rate, providing clean lines with minimal feathering on standard paper weights from 20lb copy paper to 32lb premium stationery.

These cartridges install in seconds with their tapered ends fitting perfectly into the grip section of Pilot fountain pens. When traveling or writing in the office, these sealed units eliminate the risk of ink spills that plague bottled ink users while maintaining the same writing quality. The cartridges' compact size allows carrying spares in a pen case, briefcase pocket, or desk drawer, ensuring your personalized fountain pen remains ready for use during extended writing sessions.

Inside each package, you'll find 12 identical cartridges individually sealed in blister packs that preserve ink freshness for up to 36 months. This practical refill solution works with most Pilot fountain pens including the Metropolitan, Prera, Kakuno, and Custom series, making them an essential accessory for maintaining your fountain pen cartridge writing system.

Features

• Precision-manufactured cartridges containing 0.9ml of quick-drying, non-feathering ink in either Black or Blue
• Simple push-fit installation with audible click confirmation when properly seated in the pen
• Proprietary design ensures perfect compatibility with Pilot fountain pens for leak-free performance
• Hermetically sealed units maintain ink freshness until needed, preventing evaporation or contamination
• Compact size allows carrying multiple replacements in pen cases or desk storage
• Package includes 12 identical cartridges, providing approximately 600-700 pages of typical writing