5 Oyster shells and other materials for use in nutritional additives and supplements for humans, and for use in nutritional additives and supplements for animals
17 Oyster shells and other materials for use as fillers in plastics, rubbers, caulks, adhesives, flooring, carpet backing, and other materials, and for use as a reinforcement, and for general industrial use
31 Oyster shells and other materials for use as animal feed additives and supplements