Purity: the purity of tin balls is 99.85% to 99.9% minimum. We also have 100 ppm and 50 ppm “LeadFree” tin.Product description: our tin balls are made from primary tin, i.e., from “non-recycled” raw material.This shape has been specially designed for surface treatment in order to increase the anodic surface,to avoid the “bridging” effect and to slide evenly in the bottom of the titanium baskets until it iscompletely dissolved. Uses: tin balls are used as anodes in acid tin and cyanide tin. They are placed in cylindrical orrectangular titanium baskets.Packaging: 10kg (other types of packaging available upon request).