Rotring Rapid erasers are innovative tools working by rolling up graphite and dirt particles in eraser dust. The erased surface stays clean with no smears or marks. The dust brushes easily off the media surface. B20 Rapid and B30 Rapid are the best tools to erase polymer/graphite pencil lines from all drawing media. TB20 Rapid combining eraser for pencil and ink lines is the accessory for creatives wanting two solutions in one.