For moving images and audio recordings, a temporary support used to hold the media, and which is not an integral part of the media, such as a hub (for audiotape), a core, or a reel. Videotape is generally not associated with a mount. A mount is designed for temporary use and can be changed without difficulty. Do not confuse with shell, a non-removable enclosure such as the cartridge or cassette that holds a length of audiotape. Do not confuse with outerContainer, which is the enclosure housing media or the media in its shell, such as a film can, a CD jewel case, the sleeve of a record album, or a cardboard carton used to hold multiple videocassettes.
Film. core (plastic)-2 inch; core (plastic)-3 inch; core (wooden)-2 inch; core (wooden)-3 inch; reel (plastic); reel (metal); Other; none [source: rulib]
Audiotape. large hub (NAB); small hub; pancake; Other
Wire recording. large reel (3-3/4 inch diameter); small reel (2-3/4 inch diameter); none; Other