Bansuri
A bansuri is traditionally made from a single piece of bamboo. The piece is hollow and has seven finger holes. Modern bansuri  can be made with ivory, fiberglass and different metals. A bansuri  with six holes cab play two and a half octaves of music. The flute is normally between  in length. It is about as thick as a person's thumb. One end of the flute is closed. The blowhole is a few centimeters from the closed end. Longer bansuris play deeper tones and lower pitches. The early designs have no mechanical keys. The musician makes the notes they want by covering and uncovering finger holes.