Something is amiss here. Steel's density is 8.05 g/cm3. Even if the person "measuring" the density included the air, they should have gotten about 2/3 of the full density, or more than 5 g/cm3. A number like 4.15 is closer to titanium, and I seriously doubt the little balls are titanium.
Tony Thompson
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Well, the reviewer did say it's nonmagnetic, so it's not steel. For the price they want for it, it may as well be gold, but that would be heavier, too.
