Certified from accredited lab as per ASTM E 2149-13 A for specialized bacteria. Clon (Copper Ion) coating prevents bacteria from staying on the pen surface .Revolutionary pen for a safe and worry free writing, Fitted with Quink Flow Blue (Fine – 0.8mm) Ball Pen refill Special Antimicrobial Copper-Ion coating (CION) on stainless steel body which kills 99.99% of Bacteria.