The hulusi is made of one to four bamboo pipes that have a small brass or silver reed inserted flush with the side of the pipe, and then surrounded by a gourd or brass (on modern instruments) wind chamber.

•  Hulusi has a main pipe and two drone pipes, which can play chord. One drone pipe produces high pitch and once produces low pitch. But it is not uncommon for a Hulusi to have only one drone pipe sound while the other drone pipe is merely ornamental and has no sound