1Made of nylon hair, elastic and not easy to shed hair, very easy to use, suitable for largearea coloring. 2Copper pipe interface, does not rust, special splicing technology, tightly fasten the pen tip, effectively prevent it from falling off. 3Birch penholder, firm and durable, comfortable to grip, bring you convenience. 4Suitable for watercolor painting, gouache painting, acrylic painting, oil painting, etc. 56pcs of painting brushes are available for use, meet your different needs.