A horn that is curved is tamei. But a straight [horn] is tahor. If its mouthpiece was of metal, it is tamei. [Regarding] its bell, R’ Tarfon rules it tamei, but the Sages rule it tahor. And when they are joined together, everything is tamei. Similarly, the branches of a candelabra are tahor. But the perach and the base [of the candelabra] are tamei. And when they are joined together, everything is tamei.