Our Review/Thoughts

Good works great arrived on time!!! Great pens! We have never been able to check authenticity before

Purchased to replace an old dried out marker of the same type at work

You can clearly see a difference between real and fake

The following day I took this pin out to fleamarket and started the test how it works I must've marked over $100 and it showed up right and yellow to detect that they were OK and safe

The following weekend I used the same pin it was still very bright in color and you could see that it was working

It prompted me to buy these since he has a mostly cash business

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