It is a 15-color set of markers of the aqueous pigment ink use that does not bleed-through without being blurred even to write it on a piece of paper! Because the [Features]-aqueous pigment ink, it does not navigate back even to write it on a piece of paper. -I is suitable for paper imitation paper, construction paper, cardboard etc.. When dry, it is water resistance does not flow through the water. I will be able to also be used for cloth, wood, glass, plastic, metal or the like. It is economical ink cartridge nib and because he is replaceable. -Thick-thin two uses in one. , Line thickness: 5.6mm thick, thin 1.4 ~ 1.7mm [set contents] black, blue, red, green, yellow, pink, orange, light blue, light green, red, purple, purple, pale orange, light brown, 15 color set of brown, gray