There is clock movement set for DIY use, made of plastic materials, durable and safe to use. They have good manufacturing process and have a durable service life. They are easy to use, easy to install, and helping you with the work of replacing the clock core. Features - Color: Black -Material:Plastic - Size: 13.00X0.90X0.10cm/5.11X0.35X0.04in -Note: Battery is not included. (1 x 1.5V-AA battery). - Our practical clock movement is suitable for most clocks, don't have to worry about non-compatibility. - The design of the clock core is simple and generous, and it can be easily matched with various clocks frame. - The clock core's design and accurate timekeeping function can easily win people's love. - This product is made of plastic materials, wear resistant and useful, durable and reliable. - DIY clock movement kit is exquisitely crafted, not easy to deform, sturdy and durable. Package list: 1 x Set of Clock Movement