LETRASET-Flex Markers. These markers use the same class leading; alcohol based dye inks as ProMarker and Tria for flawless; streak free color. With the soft ink flow characteristics of the brush tip; it's even easier to achieve smooth; consistent coverage. Each set includes a twelve color coordinated markers with both brush and broad tip as well as hints and tips. This package includes one set with twelve markers. Available in a variety of color sets: each sold separately. Imported.