POSCA MARKER SET FINE POINT 16-COLORSNon toxic, water based markers can be used on almost any surface. The alcohol and solvent free opaque paint covers well, is blendable, dries quickly and can be overlaid when dry. The pen has a valve mechanism for a tight paint seal and a ball inside the barrel that mixes the paint, allowing for even paint consistency, texture and continued optimal results. These versatile markers can be used on paper, glass, cardboard, wood, porcelain, metal,