INERT DEACTIATED. The British 8.5 lb (often referred to as 8 lb) Bakelite practice bomb was an inert bomb used by the Royal Air Force during World War 2. The 8.5lb break up bomb has a plastic bakelite body with a brass nose plug and steel tail assembly and hanging strap. The bomb measures `18 ½ inches long with a diameter of 3 inches. this bomb was used extensively by the Royal Air Force for bombing practice. The middle section of the bomb is stencilled in white INERT. The price for this practice bomb includes UK delivery and no licence is required to possess this inert bomb in the UK if retained as part of a collection or display. (Office shelves). O 2427