Metal containers sold empty; metallic bottles for pressurized gas or air sold empty; bottle caps of metal; metal bottle caps incorporating valves; metal bottle lids; metal bottle lids incorporating valves; metal cylinders for compressed gas sold empty; metal cylinders for compressed gas sold empty for use with gas guns; metal carbon dioxide gas cylinders sold empty; metal carbon dioxide gas cylinders sold empty for use with gas guns; metal containers in the nature of carbon dioxide gas cartri...