The Uni-ball Signo Broad Gel Impact Gel Pen is specially designed for writing and artwork. Use the thick ink that flows smoothly and looks bright over different media to create lovely artworks. Ideal for art and craft projects, this gel pen offers a good grip to help you work comfortably. Its ink is acid free and can be refilled. This package contains two 5.5-inch white gel pens with 1.0mm tips