We have had them on our offer since they appeared on the market (2013). The coats are based on nano-varnishes, they allow for a colourless or nearly colourless finish, which has not been possible in professional workmanship until now. Owing to the properties of nano-varnishes, we can offer 3-year guarantee (no guarantee until now), and they will certainly satisfy those enthusiasts of wood products who prefer a natural look... More at KARO.