Speedball Calligraphy Fountain Pens are lightweight and ergonimically designed for maximum comfort. Their precisely-machined nibs are designed with a rounded tip that contain free-flowing ink. These pens provide a superior writing experience that allows artists to create beautiful results easily. Learn more about the anatomy of Speedball Calligraphy Fountain Pens. Set includes 10 assorted refill cartridges in blue (x2), green (x2), red (x2), violet (x2) and pink (x2).