Counterfeit Detector Pens, chemical ink, black, quick test for currency, 3 EA/PK

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 U.S. currency. When mark is amber, the bill is genuine. If mark is black or dark brown, the bill is suspect.