Standard：12ml/pcs

Model NO：TR810-813  TR910-913

Properties of product：

1、  It can be written smoothly with clear handwriting，protected environment，conservation energy and good for our health。

2、  With a high bright hadwriting，more simple tinct

3、  It can be written on any nonabsorbency board，written smoothly，easy to dry，clear easily

4、  High usage，more than 98% cyclic using

5、  Non-poisonous、harmless、no simulation with water-solubility，low visual fatigue，reduce cost of maintain the electronic education

        6、A pen with 12ml can be written more than 1,200 meters，which is 1.5 case as more than normal chalk。

        7、Keep ecological balance with recycling usage。