invisible pen

invisible pen

invisible pen

Product ID: FDX-001

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The content written by invisible pen can be read through UV light, but it can’t be seen in normal light.
1. When you want to keep something secret, you can use this pen.
2. you can mark on your important things to prevent from loss but it doesn’t influence its outlook
3. UV light can be used to prevent counterfeit.
One end of the pen is the invisible pen, the other end is UV light.

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