Sophisticated new barrel design for your favorite Vision Elite pen. Ideal for the business traveler--contains a vented refill so pen won"t leak or explode due to a change in cabin pressure during flights. Exclusive uni-flow ink system regulates a steady flow of waterproof ink to the point for consistent smoothness and color intensity down to the last drop of ink. Uni Super Ink is specially-formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Bold point produces thick, vibrant lines. Uni-Ball Vision Elite Rollerball Pen, Assorted Colors.