(4) each replacement tubes and domes for your SpeechEasy Comfort Fit device.  Pack comes with (4) domes of one size and (4) tubes of one size and choice of left or right ear.  Domes available in small, med and large.  Tubes available in lengths of 0, 1, 2, 3 and choice of left or right ear. See photo to determine if your tubes are type A.