Kulak (m)
plural: Kulace/Kulaci [?]narrow end of a tube which fits into the mortise of the stock or of another tube
Andrijevci.
Širola, Božidar: Sviraljke s udarnim jezičkom [Aerophones with a beating tongue]. Zagreb, 1937, p.183 (Kulace: »Ćipuzović), 237 (Kulaci).