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UV Spy Pens

WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.

Only over-the-hill spies use lemon juice. Your modern spooks carry these. Our each is a set of (2) ultraviolet writing instruments (one for you, one for your control), 5-3/8" long pens that write invisibly and have ultraviolet LEDs hidden in the caps to reveal the message. (They run on non-replaceable button-cell batteries.) Very similar to refillable "security pens" that sell for $10 apiece.