Uni-Ball Rollerball Pen UM-153S. Ink Type: Liquid Ink, Gel Based. Nib Size: 1 mm. Nib Type: Rollerball. Nib Width: Broad. Line Width: 0.6 mm. Refillable: Yes. Cap-Off: Yes. Clip: Yes. Suitable for Left-handed People: Yes. Barrel Colour: Silver, Black. Writing Colour: Blue. Quantity: 12 Pieces per Pack. This Uni-Ball Gel Impact Rollerball Pen contains ultra smooth gel ink, which is fade resistant, water resistant and tamper proof. The pen features a...