Developed by Holbein to offer the same high pigment quality and archival characteristics of Holbein's Artists' Oil line while allowing soap-and-water cleanup, Duo Aqua Oils are characterized by rich hues, high chroma, and excellent resistance to light. - Holbein Duo Aqua Water Soluble Oils - Yellow Green, 40 ml tubeHolbein Duo Aqua Water Soluble Oil Color, YLW GRN 40ML -