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invisible ink pen
Product Detailed
UV secret message pen,invisible ink pen,UV light pen invisible uv pen, writing words are invisible,only read by UV light.
UV secret message pen,invisible ink pen,UV light pen invisible uv pen, writing words are invisible,only read by UV light.
1)One pattern:it writes words invisible,except use UV light. It is a money detector.
2)Color availble:white/blue.
