Ideal for beginner artists and professional alike, the Uni-ball PIN Drawing Pens enable neat, precise drawing and boast fade-proof, water-resistant ink making them great for use with watercolours.This pack of twelve includes pens with a variety of nib sizes and colours allowing you to produce several different line widths and create various different effects for your artwork. . Pack of 12 drawing pens in an assorted mix of colours. Various nib sizes from 0.1-0.8mm . Very strong, durable nibs . Fade proof, water resistant Super Ink . Colours available in this pack of black, dark grey, light grey and sepia. Suitable to use with watercolour work. Approximate dimensions (mm) H 228 W 360 D 2