FeaturesRetractable Gel Ink rollerballNew quick drying gel ink that has a new formulation preventing document tamperingEnhanced rubber grip provides extra writing comfort0.5mm - line widthColour: BlackThis Uni-Ball Signo 207 Retract Gel Rollerball Pen (Pack of 12) contains smooth gel ink, which is fade resistant, water resistant and tamper proof. The 0.7mm tip writes a 0.5mm line width for everyday use at home, school, or in the office. The pen has a convenient retractable design, comfortable rubber grip and a transparent barrel for monitoring remaining ink levels. This pack contains 12 pens with black ink.