Deluxe Roller Ball Stick Waterproof PenA classic rollerball pen that writes as smooth as a fountain pen, without the mess. Features Uni-Super Ink™ specially-formulated to become trapped in paper, helping prevent criminal check washing and other document alteration. Archival quality and acid-free ink provides neat, accurate lines. Attractive black matte finish with strong, long lasting metal clip. Stainless steel tip. Special Ink Type: Water-Proof; Pen Style: Stick; Ink Color(s): Blue.