These Andean pan flutes are made by the indigenous peoples of Otavalo, Ecuador. They are made from bamboo.
The large sisca pan flute has 20 tubes, the longest 13.5" long. The width of the flute is 13" wide, and it weighs 6.9 oz.
Please note that these are souvenir flutes and are not set to a particular key.
See the flute being played by the maker in his workshop in the video below.