The uni-ball Signo UM-120 Medium Gel ink pen is perfect for journaling, writing, and drawing. The pigment ink is quick-drying, fade resistant and water resistant. Strong but smooth rollerball nib, ultra-smooth gel ink. The tip is a carbide ball with a diameter of 0.7 mm. Line width: 0.4mm. The price is per piece, commercial packaging is 12 pieces.