About thin tube
Read the following if your instrument is a BTE or miniBTE style and has a thin tube (Corda miniFit) mounted to it, with a dome or MicroMold as earpiece. The Corda miniFit thin tube is an ultra-thin, discreet solution, which brings sound into your ear. The thin tube should always be used with an earpiece attached (dome or Corda mold). Use only parts designed for your hearing instrument.