The unique felt tip produces brush-like strokes making these pens ideal for lettering and calligraphy. The tip offers good control over writing while allowing to draw both thin and thick lines. Put light pressure on the up strokes for thin lines and more pressure on the downstrokes to get the variation on letter thickness for calligraphy. This set contains 12 pens of following colors: Black, Red, Blue, Green, Brown, Orange, Yellow, Gray, Pink, Sky Blue, Violet and Yellow Ochre