Dri Mark Smart Money Counterfeit Bill Detector Pen - Chemical - Black - 1 Dozen Description:Counterfeit Money Detector Pens are ideal for use in busy retail environments. This quick inexpensive currency-screening device can be used in conjunction with other counterfeit detection methods. Mark a small line on . currency. When mark is amber the bill is genuine. If mark is black or dark brown the bill is suspect. Features:Detector Pen1 DozenColor: BlackCountry of origin:/li>Brand Name: Dri MarkModel No: 2088-DRI351R1