28 colourful tuned plastic percussion tubes two sets of ocatavtor caps (16 pieces) and bag 3xC’, 1xC#’, 3xD’, 1xD#’, 3xE’, 2xF’, 2xF#’, 3xG’, 1xG#’, 3xA’, 2xBb’, 2xB’, 2xC" the sound resembles a bamboo orchestra for music lessons and for ensemble the tubes are beaten against each other or against a padded surface very popular in music education, kindergartens, schools, therapy, drum circles, and for free improvisation USA