This standard BS ISO 14546:2000 Photography. Aerial films and spools. Dimensions is classified in these ICS categories:
37.040.20 Photographic paper, films and plates. Cartridges
This International Standard specifies dimensions for films, leaders and trailers, perforations where applicable, and package marking for rolls of photographic film used in aerial applications.
This International Standard also includes the sizes and dimensions of steel or aluminium spools for appropriate sizes of film.