What do the ul marks on so many products mean?
Published July 8, 2015
2 min
    Add to queue
    Copy URL
    Show notes
    UL stands for 'underwriters laboratories,' a safety testing organization -- but what exactly does this group do, and why do they do it? Tune in and learn more about the UL mark in this podcast from HowStuffWorks.

    Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers
        0:00:00 / 0:00:00