Éra (f)
(with) definite article: la: l’reed-cap with a nozzle/snout
Mouthpiece protecting the reed if the chanter is played without the bag (which happens only at rare occasions).
Biella, Valter: Il "baghèt": un’antica tradizione bergamasca. Testi musiche e strumenti. Bergamo, 1988 (Quaderni del Misma), p.49, 55.