Berat 2 kg VESCA zinc andoes with the US Military Specification A-1800-J, the trade standard in general use worldwide. Our anodes are cast from 99.995% purity zinc alloy with small additions of special alloy element. Material Composition And Technical Data Element A-1800-H A-1800-J Cadmium 0.025 – 0.15 0.025 – 0.07 Copper 0.005 max 0.005 max Iron 0.005 max 0.005 max Silicon 0.125 max - Aluminium 0.1 – 0.50 0.10 – 0.50 Lead 0.006 max 0.006 max Zinc remainder remainder Anode performance data Nominal solution potential : -1.05 volt against Ag/AgCl Nominal electrical capacity : 780 Ampere hour per kg Nominal comsumption : 11.25 Kg Amp/yrs Nominal Driving voltage : 0.25 volts against polarized steel