clay shapers color shapers combo 0 and 2 black firm green stuff worldColour Shapers Brushes COMBO #0 and #2 BLACK FIRM Silicone Brushes Colour Shapers BLACK are excellent tools to sculpt and add incredible effects when modeling and sculpting with different putties, clays, and fimo. They are somewhere between a brush, a palette knife, a modeling tool, and your fingers. Easy to clean and long lasting. Non absorbent. This is the firm version of the black silicone brushes. They would be twice as hard as normal white