Uni-Ball UniBall AIR 07mm Medium Rollerball 6 Pack Black UBA188L

Brand Uniball Features Unis high quality Super Ink which is not only water and light resistant but also TamperResistant meaning that the ink cannot be washed off using chemicals and solutions used by people to fraudulently modify documents The metal ball of the nib is encased in an acetal plastic rather than the standard metal surround which allows for a smoother flow of ink around the ball and an increased flow as further pressure is applied The revolutionary nib of the Air unlike conventional rollerballs is pressure sensitive meaning that it gives a writing experience and differentiating line width similar to that of a fountain pen.