1. Water Color Pen: Drawings can keep for long time and easily removed/washed off under normal laundry.
   Used for temporary drawings, and easily write on fabric, skin, leather and t-shirt etc. Especially for kids use. 
2. Several nib sizes available for your reference: 2.00mm, 1.0mm, 0.8mm, and 0.5mm. 
3. Six common colors available.100 colors can be offered under order production. 
4. Ink is nontoxic, and conforms to ASTMF963 and EN71PART3.