Moser Bass Flex Tailpiece, with 4 v-shaped hook in possibilities for optimal (sound) tuning, modified to the instrument and to, the personal requirements of the musician. Through the many possible string lenghts, different sound resonances are possible, as well as a sound volume variety, that is tuned (adjusted) to the string. Wolf tones will be prev.ented with most of the instruments. With kevlar tailpiece hanger and leather pads for vibration damping.