Extremely rare, brand new, limited edition ProjectMu AutoArt Disk Brake Rotor Wall Clock. This racing rotor is made to the size of a real racing rotor, in 355mm, and 10.25″ caliper. The face of the cross-drill brake rotor is made from an aluminium sheet, hand polished to give it a hairline braking effect. The rotor with side ventilation holes are one-piece injection plastic, which the mould is very complicated with multi-side action. Battery Size:AA(1.5v) which is not included.