Introducing the ECO-MAX: the first 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 68 F -Tin Plated for Corrosion Resistance -Color Coded for Polarity Identification -Color and Die Coded for Crimp Settings -Chamfered Barrel Facilitates Cable Insertion -Exceeds SAE Standard J-1811 -Provided with Nut and Bolt Installed