The Idena ink cartridges are the perfect choice for anyone looking to equip their standard fountain pens with high-quality, erasable ink. Each pack contains 12 ink cartridges in the classic color royal blue. These ink cartridges are specifically designed for fountain pens and provide a smooth and even ink flow, resulting in clean and precise writing. The royal blue color gives your texts an elegant and professional appearance. What sets these ink cartridges apart is their erasability. If you make a mistake or need to make a correction, you can easily erase the ink with a standard eraser. This allows for error-free and clean corrections without unsightly marks. The Idena ink cartridges fit most common fountain pen models and can be easily and conveniently replaced. They offer a reliable and long-lasting ink supply, so you can continue your writing projects without interruptions.