This museum watercolour pens from Caran d'Ache are made from FSC certified cedar wood with a matte finish. They have a matte cap according to the lead colour and are also provided with a colour identification number. The hexagonal shape means that they sit comfortably in the palm of your hand. They are water soluble and have a soft, supple and durable tip. The 3.8mm lead diameter allows for a clear and precise line guide. They also have maximum opacity and a high pigment concentration for drawings with intense colours.