Write on and dry, no smearing, touch brush. A water-based "rib" sign pen suitable for addressing and office use. Writes with a soft touch. The shaft is made of resin. Ink color: blue; Ink: water-based pigment; Fine line; Line width: 0.03 inches (0.7 mm); Material: Shaft: PP, Pen core: Sliver (polyester) with clip function; Cap-type water marker