Assorted Tips - Durable nylon tips hold their shape and deliver fine, medium and bold strokes. Easy-Squeeze Barrel - Uniquely-shaped barrel is easy to hold and squeeze for perfect water flow. Portable - Easily portable and self-moistening for use with all water-based media. Versatile - With a large capacity barrel, these water brush pens are perfect for watercolor designs, calligraphy, hand-lettering, and face painting