ACME Studio's Hatch Roller Ball is the original antimicrobial pen! This award winning pen is crafted in brass and designed to take advantage of the innate properties of brass and its remarkable ability to self sterilize. Within a few hours of contact with brass ions, any bacteria or microorganism dies. An ideal pen for cold and flu season, it also makes a great gift for anyone in the medical profession. The functional properties are enhanced by the exquisite design by Karl Zahn.