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Sneaky Security
Finally, a way to find out who took your stuff. Drimark's® UV Security Marking System has a pen full of invisible reactive ink and a 2-3/8" long UV LED keychain light. Write on your stapler, MP-3 player, or lunch and a flash from your little light will expose your writing. Equally useful for validating re-admission tickets or leaving secret messages. You get a spare set of button-cell batteries for the light.
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39035 UV SECURITY SYSTEM |
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