Metallic Colored Pencils for Adult Coloring Books 12 Colored Non-toxic High Quality Metallic Colored Pencils for Adult Coloring Books 12 Colored Non-toxic with metal glossy for creative painting, the better use black paper high quality cartridges and special rubber core manufacturing process, cartridge does not slide, Not easy to break the use of advanced black wood pen, cut smooth roll safe non-toxic, no benzene, heavy metals, toxic colorants and aromatic amines and other toxic substances