Also called the 50 Sharps or 50-140 Winchester Express, they are all the same case. The bullet diameter can vary from 0.509″ (Sharps) to 0.512″ (Winchester), so it is important to know what your rifle requires and this can vary depending on whether the rifle is an antique or a modern reproduction. This brass is packaged in lots of 20. Shipping weight is 450 g/20 cases.