Small bundle of Radar blocking 'Window' or 'Chaff'. Contains lengths of thin aluminium strip or aluminized paper strip wrapped in a paper sleeve with a length of string which could be used to tear it open. These were thrown out of bomber aircraft in order to jam German Radar signals and prevent them from plotting the positions of approaching allied aircraft. Approximately 25 x 3cm diameter. Wear/tears to the wrappings but in good unused condition. Three bundles available, individually priced. Stock code M23709/10/11.