These Flat Bank Sinker precision molds guarantee no flash or trimming. Pour in the lead and take out perfect castings every time. Weight: The 3C is a 3 cavity mold - 3oz, 4oz and 5oz. The 2C is a 2 cavity mold - 6oz and 8oz. The 5C is a 5 cavity mold - 1/2oz, 3/4oz, 1 1/2oz, and 2oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Sinker Molds.