Borla (f)
(with) definite article: ladecorative fringe(s), tassel(s), &c. dangling from any of the pipes, &c.
Each of the woolen tassels of various colours, dangling from the drone.
Quijera Pérez, José Antonio: La gaita de odre en La Rioja. In: Cuadernos de sección FOLKLORE 3 (Donostia-San Sebastián, 1990), p.205.