DIFFERENT DOUBLE HEAD DESIGNS:The marker pen has two colors of black and white, and the square pen holder design makes it difficult to slide when using; The double end design of rough chisel and fine point is endowed with multi-functional properties; Fine point nib can be used for detail calligraphy mark, wide chisel note is suitable for large area daubing area, two different NIB matching design, seamless mixed coloring, can improve the efficiency of coloring HIGH-QUALITY MATERIALS:The marking pen is made of environmental protection material; You don't have to worry about stains and spots, ink is fast drying and permanent colorfast; Ink seamless smooth depiction, uniform coloring effect of the mark, increase its artistic color BEAUTIFULLY MIXED COLORS:The exquisite mixture of kinds of color marking pen provides multiple choices and colorful colors; The cap has a color recognition code, so you can easily identify and choose colors; Help you to give full play to your imagination and stimulate your creative inspiration