in 1982. It is a three-piece plastic case, measuring 142 × 125 ×, a volume of 177.5 cm3, which usually contains a compact disc along with the liner notes and a back card. Two opposing transparent halves are hinged together to form the casing, the back half holding a media tray that grips the disc by its hole. All three parts are made of injection-moulded polystyrene.

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