[Practical Design]Plastic push button which is easy to squeeze, helping you to control the volume of water more precisely. So they don't allow far much water through, flooding the paper. [Package]Comes with 24 pieces water brush pens with different point tips, 6 flat brush tips and 18 brush tips, medium, large and wide/flat tips to meet your various needs. Great for watercolor painting, water soluble pencils, brush pens, markers, use with aquash watercolor crayons,solid colors or powdered pigment. [Easy to Use]Simply unscrew the watercolour pens' to add water or ink. Easy to control the ink or water through the watercolouring brush tip. Easy to clean with less mess, well crafted, and no leaks around the seal, perfect for all water colouring needs. [Premium Quality]Watercolour Brush Pens are made of high-quality plastic, simple and elegant, comfortable and . The bristles are made of nylon materials, can hold a point fairly well, so it not or smear. They are easy to clean with water. [Convenient to Carry]Water colour painting pens are , portable,can be transported with your painting kit and used .