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. Pen Style: Stick.Ink Color(s): Green.Pen Type: Roller Ball.Point Type: Extra Fine.Line Size: 0.50 mm.Refillable: No.Tip Type: Needle.Grip Type: Smooth.Barrel Color(s): Green.Visible Ink Supply: Yes.Cap Color(s): Green.Pocket Clip: Yes.