Permanent, waterproof, fade proof, and acid-free for documents that must withstand the test of time. Pocket-proof system retracts tip when pen is clipped to pocket or folder. Soft latex-free grip provides superior writing comfort. Visible ink supply tells you when it's time for a replacement. Special Ink Type: Gel; Pen Style: Retractable; Ink Color(s): Black; Pen Type: Roller Ball.