Paper Blending For Charcoal And Pastels, Especially Recommended For Students Of Fine Arts. It Is Used To Shade Or Extend Graphite Or Charcoal And Create Gradual Or Blended Tones. It Can Also Be Used As A Drawing Instrument. Contains: 1 Diffuser √Ò 6.9 Mm And 1 Diffuser √Ò 10.5 Mm.