This 2 ounce bulb syringe is terrific for use in flushing out nibs and feeds, sections, and other parts. The bulb syringe helps to force a higher volume of water through dirty pen parts better and faster than a converter or the pen's filling system by itself. The end of the bulb syringe can also be trimmed to allow an easier over pen sections. Durable material, will last a long time.