[en.wikipedia.org] sen dollar zinc and copper 97.5% zinc, with a copper coating pennies 97.5% zinc, with a copper coating cent zinc and copper zinc and copper Cent (1¢) pennies 0.75″ in diameter one cent coin http://en.wikipedia.org/wiki/Cent_(United_States_coin) Cent http://en.wikipedia.org/wiki/Cent_(United_States_coin) [en.wikipedia.org] [en.wikipedia.org] Penny zinc and copper Wikipedia U.S. penny Source [en.wikipedia.org] US cent Wiki U.S. penny zinc and copper zinc and copper [en.wikipedia.org] The penny [en.wikipedia.org] pennies zinc and copper 97.5% zinc, with a copper coating [en.wikipedia.org] continue reading [en.wikipedia.org] http://en.wikipedia.org/wiki/Cent_(United_States_coin) US Penny Cent (1¢)