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Cinematography. Projection reels/spools 75 to 312 mm diameter for 8 mm Type S motion-picture film. Dimensions and specifications Ingestion-build-44680 The laboratory performance classification specified1 Scope and field of application This International Standard specifies the dimensions for 8 mm Type S motion picture projection reels spools of 75 to 312 mm diameter (with the exception of the 75 mm Type No. 7) that are interchangeable on all types of reel to reel projection equipment. NOTE The No. 7 reel (75 mm), although temporarily recognized, will be superseded by that specified in ISO 6033. It is recommended that new projection equipment and reel