Description : Good for repairing , replacing or making a clock . Young town manufactures the 12888SMO in various models , the existing shaft and threads before ordering and you will get the right replacement . Applicable to cross - stitch , three - dimensional embroidery , craft clock , frameless draw clock , etc . INSTRUCTIONS - Included along with the movements . Movement total Shaft length is 18 . 4 mm ( 0 . 72 inch )), thread length is 7 mm ( 0 . 28 inch ). Movement suitable for 1 - 4 mm ( 1 / 25 - 5 / 32 inch ) thickness clock panel . Specification : Material : Copper , Plastic . Second hand motion : Sweep Accuracy Within ± 30seconds deviation each month ( in normal temperature ) Battery : one 1 . 5V Carbon - zinc batteries only , not included . Please don &# 39 ; t use the alkaline batterires , whose high current output will damage the clock mechanism , because the mechanism is low power consumption . So it is recommended you to use an ordinary carbon battery . Package Includes :(4 Pack) 1 Piece Quartz Wall Clock Movement