This is a clockwork music box movement, mainly made of sturdy and material. Safe to use and easy to operate. Can provide your music box with better working performance. Made with craftsmanship and will serve you well. Features - Color: Silver - Material:Alloy - Size: 5.00X4.40X2.00cm/1.97X1.73X0.79in - You can also install the movement into a DIY box, such as wooden box, glass music box, plastic box. - Use for either a wind up music box or use for DIY your music box, very easy to setup. - When you place it in a box or on a surface and the sound will be definitely louder and clearer. - If you are tired with hand crank music box and then this windup music box is your . - Psychology therapeutic function for kids and adults through listening to the soothing music. Package list: 1 x movement(City of Sky)