Alcohol-based solvent is the main solvent and uses environmentally friendly ink that is safe and dries quickly, allowing you to write on metal, rubber, and plastic for vibrant coloring. Also environmentally friendly. For customers! The main ink solvent from xylene to alcohol-based solvents. For industrial use with various materials, marking and identifying components. Color: Yellow-green; Letter Size: Medium; Size: Shaft Diameter 0.7 inches (17.0 mm) x Total Length 5.6 inches (142.9 mm). Body: Alcohol-based solvents. Core: Acrylic fiber.