Characteristic of the So-na (Suona) are the profiled body made of dark-coloured wood, in which each finger hole is located in a turned recess, and the bell made of aluminium or brass. An attachment with two balls (which can also be perforated) and two discs carries the small reed. The instrument has seven frontal tone holes and a thumb hole. This type is also played in Japan and Vietnam. This old so-na still shows traces of pressure from metal hoops between the keys. The metal hoops were removed, the body wrapped in cloth (?) and painted with black lacquer. The instrument now has seven frontal oval tone holes and no thumb hole. The funnel was made of copper. The pipe support has the usual two decorative balls between two discs and a straw mouthpiece;