Oyaide's high fidelity soldering tin, SS-47, provides high quality soldering. It contains pure 4N tin (99.993%) obtained by removing impurities to the maximum. In addition, 4.7% silver and 1.7% copper are added to improve the electrical conductivity and durability of the soldering. Surface corrosion and residual chlorine are reduced to less than 0.12%. In addition, due to the presence of a special material, the SS-47 flux offers a fast diffusion rate of 83% ensuring ease of use.