Replacement nitrile in-ear coupler for MiEMi measurement equipment. This spare part fits all MiEMi sizes and is sold in pairs for convenient replacement during calibration workflows. It is a passive, non-electronic accessory designed for in-ear measurements, providing consistent acoustic coupling with MiEMi units. Packaged as a pair to match the two-ear design. Manufactured by SLS, article rc, weight 1 g, dimensions 30 x 10 x 10 mm. Origin: UK; HS code 4016.93.00.