tombow mono twin tip permanent black marker
MONO Twin Permanent Black Markers feature both a fine and broad tip. Two tips are great for drawing and producing a variety of line widths. Ideal for professional fine art and craft, this long lasting marker makes a very black, solid line. The ink is smear-proof and can be colored over with Dual Brush pens instantly even on very absorbent paper. The tips stay fresh and firm no 'mushing down' of tips.