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Got a couple buckets of these ten or twelve-armed contactors. These are the tips, which contain a contact button, some small and others larger. These end sections shown are only a quarter inch or so at their longest dimension, but the whole arm is about 5 inches. They are naturally a chocolate milk brown, but whitish metal when cut. The unusual quality is that these tips have been in 30 Baum HCl for several days, with no apparent dissolving, just deepening of the brown exterior color. Any idea of composition? Would Chris be willing to use his magic machine to determine makeup and desirability to Boardsort? Some of the contact points are obviously silver, as they have tarnished black, while others remained brilliant all these years, in the same environment. But the pressing question is, what metal is brown?