Customer’s impression:
good excellent nice OK cool
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  • Optical prism

    posted by yuraao on 06/18/2017

    Impression:Very interesting;

    The device is very interesting, it divides the sun light into visible colors: from red to violet.
    First I bought 4 pieces, now I bought 3 more. It's an interesting present to give away to your friends and co-workers.

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