Koh-I-Noor Syringe for Cleaning Pens is designed to be used with the Koh-I-Noor Rapido-Eze Cleaning Kit. Use with the Rapid-Eze Cleaning Solution for the quick removal and maintenance of technical pens. The solution unclogs pen points, technical pens, calligraphy pens and airbrushes. It dissolves dried ink on all pen parts. Solution is non-flammable and doesn't harm plastic or metal. Keep your pens clean for long-lasting use. Made in USA. Koh-I-Noor - bringing you the best in professional grade drawing and design.