Precise chronograph motor: Size-The main shaft length is 17 mm/0.67 inches, and the thread length is 9.7 mm/0.38 inches; the second movement is suitable for a clock panel with a thickness of 2-6 mm (0.08-0.24 inches). It adopts high- clock mechanism to provide the accuracy and reliability of the ; it is powered by an AA battery. A good choice for DIY or repair: The music melody pendulum trigger clock movement replacement set comes with 4 pairs of different hands, spades, wonderful, straight (3 black and 1 gold), suitable for repairing, replacing or making clocks by yourself . The simple style clock movement can match various colors, patterns, and shapes of the clock panel, it not stand out, and good movements be very good. Four most popular clock hands. Different sizes, colors and styles. It only needs one package to meet different needs. It is suitable for , three-dimensional embroidery, craft clock, and frameless clock; without additional cost, you can select the pointer style and length that match the clock. The clock panel diameter should be larger than 8.27 inches/21 cm. The hands of the clock should be smaller than 9.84 inches/25 cm.