Uni-Ball Signo Gel Grip Rollerball Pen Black (Pack of 12) 9003950This Uni Ball Gel Grip Rollerball Pen features high quality gel ink, which is fade resistant, water resistant and tamper proof. The medium 0. 7mm tip writes a 0. 4mm line width for everyday use. The pen barrel also features a window for monitoring remaining ink levels and a rubber grip for comfort. 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