Ear Plugs

Here’s an a link to this product on Amazon: https://amzn.to/2VlUJ6U When tested with an XRF instrument these Mack’s Pillow Soft Silicone Putty Earplugs had the following readings (with each test done for at least 60 seconds and all metals decade by the XRF listed below): Barium (Ba): 895 +/- 169 ppm Barium was the only metal…