KURETAKE GANSAI TAMBI ”Sumi Colors” 6 color set//MC20SU/6V | Kuretake product catalog site https://item.kuretake.co.jp/kuretake-web/DispDetail.do?volumeName=00002&itemID=t000100133229&cate1=Watercolor+System&cate2=Gansai/Watercolor&cateType=c1&scode=2470020606