Copper
Heb. nechosheth, in the Authorized Version always rendered "brass," except in (Ezra 8:27) and Jere 15:12 It was almost exclusively used by the ancients for common purposes, and for every kind of instrument, as chains, pillars, lavers and the other temple vessels. We read also of copper mirrors, (Exodus 38:8) and even of copper arms, as helmets, spears, etc. (1 Samuel 17:5,6,38; 2 Samuel 21:16)