This 12 piece marker set is water based dye ink. This set from Kuretake ZIG is part of the Clean Color Real Brush Marker Single Tip line of products. These 12 markers come in Gentle Colors. These markers include one single fine tip. These markers can be used wherever your other markers are used and will give outstanding results. The markers are color coded on the front, so when it comes to reordering, you can order by color number.