1íóthe write trace can not disappear spontaneously. 2íóeasily and quickly erasable by water. 3íócan write on any surface, especially use for dressmaking, shoemaking, handicraft, Embroidery, artificial flowers, etc.. For temporary making. 4íówe have variety of tubes and nibs for your choice. 5íónontoxic ink. **use scope: dress marking, hoe marking, handicraft, embroidery, artificial flowers. Method 1: medium box: 12pcs per dozen, 10dozens in one medium box, 12 medium boxes in one outer case. Method 2: 200pcs in one medium box, 8medium boxes in one outer case.