Shure R57 Cartridge for SM56, SM57

The Shure R57 is a factory replacement cartridge for the SM56 and SM57 dynamic microphones. It contains the same Unidyne III based cardioid dynamic element used in original production, restoring the microphone to factory performance after damage or wear. A straightforward service part for touring inventories, rental houses, and studios that keep SM57 stocks in rotation.