What is the name of the bell used for that ensemble in the Big Bang Theory Season 6 Episode 11? Where can I buy it?

The hand bell is a hand-cranked percussion instrument. It consists of three parts: the body of the bell, the handle and the hammer. The body of the bell is to determine the sound of the hand rattles, but also determines the pitch of a single hand rattles, generally made of copper. The handle is usually made of leather, and now also made of plastic. The hammer is hinged into the body of the bell and can be adjusted to determine the loudness of the bell. Musicians can play in a variety of ways, the most common being hand-cranked, where the hammer in the hand-cranked bell strikes the body of the bell to produce the sound. Because individual handchimes have only a specific pitch, handchimes generally contain a number of scales in a set configuration.