Made of alloy material, this mechanical movement is durable, not easy to deform, can effectively resist oxidation and rust. Using an automated movement, you 't have to worry about its battery life and it also has a long service life. [Small and Portable] Small and convenient, this watch movement is convenient to store and carry, with storage box, which is not easy to lose. The hollow design makes the watch movement more design, simple and easy to use. It is an exquisite watch repair accessory. The watch movemnet is one of the professional watch repair tools, suitable for repairers, saving you expensive repair costs. Item Type:Mechanical Movement Application Scope:Used for Replacement of Watch Movement Colour:Silver Material:Metal Size: Maximum Length of Movement:. 43mm/1.7in Movement Diameter:. 31mm/1.2in Package Contents: 1 x Mechanical Movement 1 x Plastic Storage Box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.