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 1.0mm tip for a broad 0.6mm line width, and a rubber grip for comfort in use. This pack contains 12 pens with black ink.Rollerball pen with ultra smooth gel inkInk is fade resistant, water resistant and tamper proofRubber grip for comfortUM-153s Bold 1.0mm tip for a 0.6mm line widthCap with convenient pocket clipBarrel colour: Silver with transparent viewing windowInk colour: BlackPack of 12DocumentsSafety Data Sheet