This International Standard specifies the characteristics of three sizes of reefs for 12;7 mm (0.5 in) wide magnetic tape to allow physical interchangeability of such reels. The sizes are
size 16
size 18
size 22
Their dimensions differ only in the overall diameter of their flanges. All other requirements of this International Standard apply equally to all three sizes. All requirements refer to empty reels, except for 8.2 which refers to full reels.
Reels specified in this International Standard are intended for applications where the larger reel (size 27) specified in ISO 1864 is not used.
Reels complying with this International Standard cannot be used with the self-loading cartridge specified in ISO 6098.