Tombow 56174 Blending Palette with Color Chart, White Designed for use with the Tombow Dual brush pens to help blend your colors with precision and confidence. One side functions as a blender, and the other side functions as a color guide. Use the blender pen as a wet brush to mix the colors and apply them. Compact size makes it easy to carry anywhere. Simply wipe off the ink with a paper towel or wet cloth.