Approximate size: 5.6 x 5.6 x 1.5 cm / 2.2 x 2.2 x 0.6 inches. The total length of the shaft is 12 mm, and the length of the yellow propeller is 5 mm. (Note: Please measure the clock mechanism you need before purchasing.) Diameter: minute shaft diameter 3.6-3.7 mm, hour shaft diameter 5.5 mm. Screw diameter 7.6 mm. Suitable for DIY quartz wall clock replacement movement parts, suitable for 3D frameless wall clocks. The error is less than +-1.5 seconds/day, and the power consumption is less than 200 microamps. Powered by 1 AA battery (not included), you can use 5 AA batteries, carbon batteries and alkaline batteries. Rechargeable batteries cannot be used). IMPORTANT: This model is a common 5mm shaft, suitable for clock panels with a maximum thickness of 4mm, otherwise the front nut cannot be tightened and the clock cannot work!! (Due to different measurement methods and measurement methods, the measured length may be slightly different from the actual value. Thank you for your