These Sennelier Brush Pens have real synthetic fibre brush tips & thanks to the real fibres, the application of the colour is more fluid, constant & linear, taking advantage of the internal capillarity of the brush to facilitate the dispersion of the colour. In the same gesture, the artist can create extremely fine & very wide lines (up to 10mm) with a continuous flow of pigment based ink, by simply varying the pressure of the tip applied onto the paper. The pigment based formula is enviromentally friendly & exclusive to Sennelier. These Sennelier Ink Brushes are equally suitable for Lettering enthusiasts, Bullet Journal fans & watercolorists. The colours are blendable, water soluble & permanent when dry Contents Iridescent Lemon Yellow Iridescent Orange Rose Iridescent Ultramarine Blue Iridescent Dark Green Iridescent Black Iridescent Silver