Prismacolor Premier Art Markers are dual-tipped, double-ended markers that feature advanced ink formulations for rich color saturation and silky smooth coverage. Nontoxic ink is alcohol, dye-based ink with a single ink reservoir that guarantees color match from end to end. Multiple line widths are available in one marker.Colors include: 3 BLACK, WARM GREY 10%, WARM GREY 20%, WARM GREY 30%, WARM GREY 40%, WARM GREY 50%, WARM GREY 60%, WARM GREY 70%, WARM GREY 80%, WARM GREY 90%