The Koh-I-Noor Rapido-Eze Pen Cleaner is an 8oz bottle of high-quality pen cleaner. It is designed to effectively clean and restore the performance of all types of pens, including fountain pens, technical pens, and calligraphy pens. It removes ink deposits, residue, and clogs, ensuring smooth and consistent ink flow. The Rapido-Eze Pen Cleaner is a must-have for any artist, writer, or pen enthusiast.