Imboccatura (f)
tube through which the bag of a mouth-blown bagpipe, &c. is inflated
Boccaglio, Gonfiatoio, Insufflatore, Portafiato, Soffiatoio, Zampogna
Valvola
Leydi, Roberto: La zampogna in Europa. Como, 1979, p.36, 51, 54 & passim.