Manufactured by Sankyo, the world's leading producer of musical movements, this sturdy 18-note movement is the most widely used type of musical movement placed in craft, hobby, and gift projects. The mechanism on this movement is encased in a white, plastic, removable shell. The movement measures 2- 1/8" L x 1- 7/8" W x 1- 1/16" H. When fully wound, it plays approximately 2-1/2 minutes. It has 18 notes to provide a nice range of tones. It winds from the bottom and a gold-tone, 3/4" L winding key with a 9/16" stem is provided. This movement plays "Over the Rainbow".