Clock inserts/clock fit-ups Size:55mm Materials:Zinc alloy Roman and others for your choice Clock insert:RZ-CK055-Diameter:55mmMaterials: Zn AlloyFinishe: ... /SilverType:Roman or others Free replacement battery with each clock inserts.Available size:27mm,33mm,37mm,43mm,50mm,55mm,60mm,65mm etc ... .If you would like to order the other size and styles clock inserts,please feel free to inform us,then we ...