Create fine to broad lines with a single stroke. Durable synthetic bristles retain their shape. Ideal for drawings, cartons, Manga-style artwork, Oriental calligraphy etc. Permanent black pigment ink. Clean and simple to refill. Brush pens come in a pack consisting of 1 pen and 4 refill cartridges. Sold in units of 12 (dozen) Create fine to broad lines with a single stroke. Durable synthetic bristles retain their shape. Ideal for drawings, cartons, Manga-style artwork, Oriental calligraphy etc. Permanent black pigment ink. Clean and simple to refill. Brush pens come in a pack consisting of 1 pen an 4 refill cartridges.