1)Harmless to your skin 2)To make the surface smooth 3)Economical, strong cleaning capacity 4)OEM Application: ... for metal Chinaware, marble surface, glass eliminating copper cleaning ball1. The material is copper , there are H60,H62,H65,H80and follow ... household ware's cleaning.3. It doesn't hurt the pots & pats, of course, don’t also hurt our hands.4,Accept ...