Manufacturer Code : KF14621. Q-Connect Counterfeit Detector Pen (Pack of 10) KF14621.This Q-Connect detection pen helps identify counterfeit notes to protect against fraud. Simply apply to a note and if the ink appears brown or black, the note is most likely counterfeit. The detector pen has a 96% rate of accuracy on bank notes of all denominations. Great for retail and cash handling businesses, this pack contains 10 detector pens.