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 Resistance. Provided with Nut and Bolt Installed. Exceeds SAE Standard J-1811. Color Coded, Die Coded