Chances are, its made by the same people who packaged their "copper ice" grease, which is simply a copper-anti-sieze compouind mixed with silicon compound. At best, 30% copper by weight.
I suspect the 99.99% micronized silver is bull, but no one knows for sure. Then again, it could be 99%, but by volume and not weight. Then comes the point of how you determine volume of a powder 😉
Mike