ProMarkers are the ideal marker for crafting, design and illustration, rubber stamping, and so much more * These markers allow you to easily overlay and blend colors to create shade and tone; twin tips offer a fine bullet tip for details and a wider tip for large areas * Alcohol based, quick drying, and non-toxic * This package contains 12 markers, blending pen, blending chart, and convenient carrying case * Conforms to ASTM D4236