1Automatic Mechanical Movement: You don't have to worry about its battery life, high accuracy and reliable to use. 2Alloy Material: High quality alloy material, not easy to deform, can effectively resist oxidation and rust, and is durable. 3Size: The maximum length of the movement is 1.4in, and the diameter is 1in. Perfect replacement for an old movement. 4Hollow Design: Simple and easy to use, more exquisite. Small and convenient, convenient to store and carry. 5Professional Watch Repair Tools: Suitable for repairers and amateurs, saving you expensive repair costs. Item Type: Mechanical Watch Movement Material: Alloy Color: Silver Movement Maximum Length: Approx. 35mm/1.4in Movement Diameter: Approx. 26mm/1in Purpose: Replace the old mechanical watch movement. 1 x Watch Movement 1 x Plastic Storage Box 1 x Bezel 1 x Pin 2 x Screw Due to manual measurement, there may be a slight error. Thanks for your understand.