D'Addario EJ80 Phosphor Bronze Octave Mandolin Strings, Medium, 12-46 music_update_2021 and the booster is not

and the booster is not required

Bridge Cover Pole Spacing: 65mm

Please clean the mouthpiece well with alcohol wipes and allow it to dry before installing

Read more Universal: All Headphone Type Fitted Material: Aluminum(Anodized)+TPU+ABS What's in the box

Functional Addition-- Replaces old machine rubber mats and adds accessories for new "phonographs"

D'Addario EJ80 Phosphor Bronze Octave Mandolin Strings, Medium, 12-46 music_update_2021 and the booster is notD'Addario EJ80 Phosphor Bronze Octave Mandolin Strings, Medium, 12 46 D'Addario' s octave mandolin strings are designed for use with octave mandolins of various scales. The unwound strings are made from plain steel and the wound strings are phosphor bronze. Phosphor Bronze was introduced to string making by D'Addario in 1974 and has become synonymous with warm, bright, and well balanced acoustic tone. D'Addario Phosphor Bronze strings are precision