Centurion Smart Money Multi-Colored Counterfeit Pens 12 pk, 12PK, Monarch, Mfr#: 351R-1

Highly effective & inexpensive tool for detecting bad bills. Simply make a small mark on U.S. currency. Chemically sensitive ink works instantly. An amber mark passes the test while a dark brown or black mark means the bill is probably counterfeit. Works on all new design U.S. currency bills series 1959 & later.