Dimensions 57mm x 72mm x 27mm. Pendulum adjustable up to 400mm. Brass finish brushed bob Diameter 70mm. Supplied with rubber washer and centre fixing nut. Spindle lengths and diameters: Hour 13mm. Diameter 5mm. Minute 16mm. Euroshaft 2.60mm x 3.30mm. Battery: LR6 AA (not supplied).