111.242.221 (Sets of hanging bells without internal strikers)
A bell tree, also known as tree bells[1] or Chinese bell tree[2] (often confused with the mark tree), is a percussion instrument, consisting of vertically nested inverted metal bowls. The bowls, placed on a vertical rod, are arranged roughly in order of pitch. The number of bowls can vary between approximately 14 and 28. An effective glissando is produced by sliding a triangle beater, a glockenspielmallet, or a xylophonemallet down the length of the tree. The bells are usually pitched to microtonal intervals and do not represent any formal scale.[2] When a glissando is played, the inexactness of the order of the bowls' pitch is unnoticeable, merely creating a fuller sound.[3][4]
The bell tree is often used to accentuate the start or end of passages of music with a "bright", "shimmer" effect, adding complexity.[5]