Preventa® Deluxe Antimicrobial Counter Pen with Built-in AgION™ - nature``s antimicrobial AgION™ Protects the pen by preventing the growth of bacteria and microbes. Chrome-plated brass holder and tip provide added durability. 24" high-strength ball chain attaches to square adhesive base, keeping your pen secure. Pen Type: Ballpoint; Special Ink Type: N\A; Pen Style: Counter; Ink Color(s): Black.