Uni-Ball Gel Impact 1.0mm Black Rollerball Pen (12 Pack) 9006050 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 ink Ink is fade resistant, water resistant and tamper proof Rubber grip for comfort UM-153s Bold 1.0mm tip for a 0.6mm line width Cap with convenient pocket clip Barrel colour: Silver with transparent viewing window Ink colour: Black Pack of 12