There is clock movement set for DIY use, made of acrylic 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:Assorted Color -Material:Acrylic -Size:24.00X24.00X2.00cm/9.43X9.43X0.79in -Note: Battery is not included. (1 x 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 acrylic materials, wear resistant and useful, durable and reliable. - DIY clock movement kit is exquisitely crafted, not easy to deform, sturdy and durable. Package list: 4 x Sets of Clock Movements