These chimes are a wonderful charity product from Woodstock. The price of the chimes is donated in whole to autism research and awareness campaigns. Hangs 25" with five silver tubes tuned to the opening notes of Mozart's Piano Concerto No. 1, a composition and artist that is frequently employed in music therapy. The size of the clapper is designed so that the notes are struck gently, releasing a soothing tone ideal for those hypersensitive to sound.