Copper tubes and pipes

741110 Copper; tubes and pipes, of refined copper 741121 Copper; tubes and pipes, of copper-zinc base alloys (brass) 741122 Copper; tubes and pipes, of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver) 741129 Copper; tubes and pipes, of copper alloys (other than copper-zinc, copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel-silver))