Polish precious stones, delicate pieces, metal coins, and more with the Diamond Pacific Mini-Sonic Hopper - 10 lb. Capacity. This hopper is made from cast polyvinyl and holds up to 10 pounds of material. It is designed for use with the Diamond Pacific Mini-Sonic tumblers. About Diamond Pacific For over 30 years this second-generation family-owned business has manufactured equipment for lapidists - from rock hound hobbyists to professional gem cutters and jewelers. Diamond Pacific hopes to put fun and pride into the craft by manufacturing the necessary tools to ensure superior results. * 10-lb. capacity barrel * Made from cast polyvinyl * For use with Diamond Pacific Mini-Sonic tumblers