Kingtoys Clock Movement Mechanism with White Hour Minute Red Second Hand DIY Tools Kit Movement size: 5.6 x 5.6 x 1.6 cm Second hand length: 12.3 cm, Minute hand length: 8.3 cm, Hour hand length: 6 cm Principal axis size: 18.5 mm, Screw thread size: about 10.5 mm Mode: silent mode Need one AA battery.(not included)