1.Patented product, self-owned brand 2. recycle to use,can add ink 3. nib do not dry 4.wet erase with water 4. MOQ:10000pcs Product Name: LKT green teaching pen Style No.:PK-01/1color: red (have 3color: black,red, blue)Specification:Patented product, self-owned brand, environment protection designLkt green teaching pen can be recycled and you can refill ink. The nib can be changeable . Long ...