The UNI PWE-5M 2.5MM YELLOW 9 liquid chalk marker is ideal for creating illuminated signage and decorations on glass, mirrors, and blackboards. Its 2.5mm conical tip offers excellent stroke control for writing clear messages and drawing precise outlines. The water-based formula produces an opaque layer of vibrant yellow color that stands out with high visual impact on dark or transparent surfaces. It cleans easily using only a damp cloth, leaving no residue or stains. Perfect for shop windows, restaurant menus, and home organization.