Patented needle point technology ensures skip-free, effortless writing. Airplane-safe, concentric ring ink delivery system remains unaffected by standard air pressure and altitude variations. Rubber grip with traction pockets provides easy gripping and long-lasting comfort for your writing hand. Waterproof, fade-resistant ink. Special Ink Type: N/A; Pen Style: Stick; Ink Color(s): Purple; Pen Type: Roller Ball.