Size: The total shaft length is approx. 20mm/ 0.79inches, and the thread length is approx. 13mm/ 0.51inches, fit clock dials 9 - 13mm/ 0.35 - 0.5inches in thick. Accurate Time and Quiet Motor: The long shaft wall clock mechanism replacement offers great accuracy and dependability, equipped with 6168s silent sweep second movement, no ticking and will provide you with a quiet environment. 7 Different Styles of Hands: This battery clock replacement mechanism set comes with 7 pairs of different pointer and length, great for repairing clocks, clock replacement or making your own customized clock project. Wide Application: These clock repair replacement part kit can be applied in bedroom, living room, office, classroom, restaurant, etc, fit for craft clock, quartz wall clock and so on. Note: When you install this quartz clock movement kit, please keep the hour hand and minute hand parallel, and not tighten the brass hex nut too tight. Colour:black Material:Plastic + Metal Package Contents: 3 x quartz clock movement mechanisms 3 Sets x screw accessories 7 Sets x clock hands 3 x Hooks 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.