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Marker Pen is always such a mess on designer's table. Now with Joint marker pen, whether you want to line or stand it, it's easy job. Caps of Joint marker pens can join together like jigsaw so that all the marker pens link neatly and steadily with each other. Moreover, Designers can easily distinguish the color and the bigger nib of the Joint marker pen. If you like, you can play jigsaw puzzle with Joint marker pen as well.
Hou Jingyan Chen Huijun Lin Xingmin