- Cartridge Type: Euro format for easy compatibility with a variety of writing instruments. - Tip Size: Stable 0.5 mm metal tip delivers precise, controlled lines that enhance your writing experience. - Compatibility: Designed specifically for use with the Topball 811 ink roller ball, ensuring optimal performance and a perfect fit. - Ink Type: Utilizes high-quality, water-based ink that provides smooth, consistent flow but is not erasable, ensuring your notes and documents remain permanent. Key Benefits: - Experience seamless writing with minimal skipping, ideal for detailed work or everyday tasks. - The durable metal tip ensures longevity and reliability, making it perfect for both professional and personal use. - Water-based ink offers vibrant colors and sharp lines, enhancing readability and presentation. Practical Applications: - Perfect for students taking notes in class, providing clear and legible writing that stands out. - Ideal for professionals drafting documents or reports, ensuring your work looks polished and professional. - Great for artists and designers who require precision and consistency in their sketches or illustrations. Choose this ink cartridge for a dependable, high-performance writing solution that meets your everyday needs.