The Waterman Serenity Black Ink Cartridges are a set of 8 long cartridges designed for use with fountain pens. Made with black ink and manufactured in France, these cartridges are perfect for collectors or pen enthusiasts looking for high-quality writing instruments. The sleek design and durable plastic material make these cartridges a reliable choice for smooth and consistent writing. Each cartridge is brand new and individually sealed, ensuring a fresh and uninterrupted writing experience with every use.