Koh-I-Noor Pressure Pen Cleaning Kit includes a pressure bulb, coupler and 2 oz. jar of Rapido-Eze Cleaning Solution. The cleaning fluid is for the quick removal and maintenance of technical pens. It unclogs pen points, technical pens, calligraphy pens and airbrushes. The cleaning solution also dissolves dried ink on all pen parts. It 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.