Add to Cart Quick view Dri-Mark V403166 Counterfeit Detector Pen - 1 Pkg MSRP: $4.99 Now: $4.15 Was: Add to Cart Counterfeit Detector Pen - 1 PkgSpecial patented formula detects bad bills. Effective on all U.S. currency. MSRP: $4.99 Now: $4.15 Was: Add to Cart Quick view