ITEM NAME:15mm Long Thread Quiet Mute Quartz Clock Movement Mechanism DIY LJ 15mm Long Thread Quiet Mute Quartz Clock Movement Mechanism DIY LJ a.imagelink a:hover.imagelink {color:#000000;.Screw Thread Rod Length : 15mm. - Easy and simple design. Great for repairing, replacing or making a clock. - Crystal Frequency : 32.768KHz. - Circumferential Output Frequency : 0.5Hz. - Shaft Length : 22mm.