1. The write trace can not disappear spontaneously. 2. Easily and quickly erased by water. 3. Can write on any surface, especially use for dressmaking, shoemaking, handicraft, Embroidey, artificia flowers, etc..For temporary making. 4. We have cariety of tubes and nibs for your choice. 5. Nonotoxic ink. Packing:12pcs/bag, 20bag/box, 6boxes/carton G.W:13kg/carton