What is "takumbo"

The takumbo is a parallel-stringed tube zither made from bamboo, and is found in the Philippines. It is made from a heavy bamboo tube about 40 cm long, with both ends closed with a node. Two strands of strings, about 5 cm apart, are partially etched out from the body of the bamboo. Small wooden bridges are inserted beneath the strings at both ends. At the center of the bamboo tube, below the strings, a small hole is bored. The small hole is covered with a bamboo plate clipped to the strings.