The flagstaff head (finial) is the decorative ornament at the top of a flagstaff.
Only the above finials are authorized for use on flags used by Army organizations.
Eagle: The eagle is used on Presidential flagstaffs.
Spearhead: The spearhead is the only device used with Army flags.
Acorn: The acorn is used on markers and marking pennants flagstaffs.
Ball: The ball is used on outdoor wall mounted flagstaffs for advertising and recruiting.