COPIC markers are versatile refillable markers with fast-drying, permanent non-toxic ink. These bold, oval barrel markers have an extra broad nib that makes a stroke about 3/4" wide. It offers smooth, consistent coverage over large areas. It is ideal for architectural drawings, backgrounds and calligraphy. The tip of the nib offers a nice fine point for detail work. The nib is replaceable. All COPIC Wide sets include matching refill inks.