Abstract: A cassette and associated spool for film, sound track and like material, with means for supporting the outer areas of the spool flanges to prevent sagging and warping of the spool flanges. The support means comprises interengaging formations on the cassette and on the spool. The interengaging formations may include projections on one of the cassette and the spool and recesses on the other of the cassette and the spool. Alternatively, the formations may comprise resiliently and radially displaceable areas of the cassette side wall which locate between the spool flanges when the cassette lid is fitted to the cassette base.