Product Description This Flat Nji Water Brush is very versatile and makes a handy tool for stampers, artists, and crafters. It holds 7ml of water in its water container. The brush is flat. The YASUTOMO NIJI WATER Brush is a very versatile combination of brush and water container. They are available in four nylon brush tip sizes — small, medium, large and flat. These brushes can be used for a variety of purposes, including watercolor, rubber stamping, silk painting, bleaching, face painting and more. The Nji Water Brush is a great tool for artists, crafters, rubber stampers and students. It comes in different brush tip sizes for a range of creative expression. You can use the small for fine detail work such as filling in areas of a rubber stamp image or miniatures. The medium is an all purpose brush capable of fine work as well as bolder strokes and the large is great for big juicy color washes. Just fill the reservoir with water and you are ready to go. PLEASE NOTE: The Waterbrush is intended for use with water only but you can experiment by filling the reservoir with water-soluble dyes and inks. It is not recommended for acrylic or solvent based paints or inks since the pigment may solidify and clog the brush. Always check the manufacturers labels for ingredients contained with the pigments. Always clean your brush after use and empty the reservoir and let dry completely when not using the brush for long periods of time.