Soska (f)
original: соска
tube through which the bag of a mouth-blown bagpipe, &c. is inflated
Blowpipe; Often without valve (the blowpipe tilted aside instead, when necessary).
Атлас музыкальных инструментов народов СССР = Atlas of musical instruments of the peoples inhabiting the USSR [1963]. Вертков, Константин А. (Vertkov, Konstantin A.) / Благодатов, Георгий И. (Blagodatov, Georgij I.) / Язовицкая, Эльза Э. (Jazovickaja, El’za E.). Москва (Moskva), 1975 (2), p.44.