Economical & resource efficient ink refill. Permanent marker is convenient for addressing and writing names. The ink uses alcohol-based solvents. Ink color: red; Round core; Line width: 0.06 inches (1.5 mm); Lead diameter: 0.1 inch (3 mm); Ink: Oil-based dye; Cap type; Ink refillable: KR-20; Tip material: acrylic fiber; Product name: art line