Pens color | A set of nine -colored black core, The black shell contains the black core, The red shell contains the black core, There is a black core in the dark blue shell, There is a black core in the green shell, The yellow shell contains black cores, There is a black core in the golden shell, There is a black core in the light blue shell, Dark gray shell contains black core, The silver shell has a black core, Three pen heads and one group is the core of the core, Random cases do not choose black cores |