Size About : 5.6 x 5.6 x 1.5cm/2.2 x 2.2 x 0.6inch. Minute Shaft Length: 14mm. Hour Shaft Length: 10.8mm. Diameter : The Minute Shaft Diameter is 3.63.7mm, and the Hour Shaft Diameter is 5.5mm. Screw Shaft Diameter 7.6mm. For DIY quartz wall clock replacement movement part, applicable framless 3D Wall clock. 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 No.5 AA batteries, carbon batteries, alkaline batteries. Cannot Use Rechargeable Batteries). Warm Tip : This model is an ordinary shaft of 5mm, which is suitable for clocks whose backplane thickness does not exceed 4mm, otherwise the nuts on the front cannot be tightened. Due to different measuring tools and measuring methods, the measured length may be slightly different from the actual, thank you for your understanding ! ! !