The uni-ball Signo UM-120NM metallic gel pens are excellent for all kinds of creative work. The ultra-smooth metallic ink dries opaque, is fade resistant and water resistant and looks impressive on both light and dark paper. Strong but smooth rollerball nib, ultra-smooth gel ink. The tip is a carbide ball with a diameter of 0.8 mm. Line width: 0.5 mm. The price is per piece, commercial packaging is 12 pieces.