Environmentally friendly, 100% copper battery terminal. The post top design is manufactured with the highest quality C11000 ETP copper and is completely lead free and RoHS compliant - making it exempt from CA Proposition 65 requirements. Maximum conductivity (101% IACS at 68F)Tin plated for corrosion resistanceProvided with nut and bolt installedExceeds SAE standard J-1811Color coded, die coded