1.1 This International Standard specifies the dimensions for 8 mm Type S motion-picture projection reels size 7, with a nominal film capacity of 15 m, generally used for returning the film from the processing laboratory and considered to be interchangeable in all models of 8 mm Type S projection cassettes (encapsuled devices), having an allowance for reels with up to 75 mm maximum outside flange diameter. This type of reel also fits normal reel-to-reel projection equipment. 1.2 This International Standard supersedes the specification given for the No. 7 reel described in ISO 3639. NOTE — The device specified in this International Standard is the same as the one identified as a spool in some countries. In others, a reel is used only with projectors, and spools having solid flanges are generally for raw stock used in cameras.