This portable antenna can be used for the top section of a Vertical Antenna OR Horizontal elements  for an Antenna System  such as  the Buddipole ^tm ......      A Great QRP / Portable Antenna weighs only 400 Grams [14 Oz ] and measures 104" extended yet only 14" long when folded.

The construction is the same as is used for sectional fishing poles.  Each of the 8 hollow tubular metal sections has a plug one one end and a socket on the other end.  All the sections are connected by a string made of either a cloth or metal cord.  At the bottom of the base element there's a spring inside the tube to tension the cord. Some units may  use an elastic shock-cord material.     This way all the elements are kept in order when they are disconnected from each other and are held together when assembled into a 104" [8.6 Ft]  long antenna.   When the elements are folded or disassembled  the package is only 14 inches long. 
The base has a male 3/8-24 thread which is the same as is used on most Ham Radio and CB antennas.  Some sort of spring base  could be used when this antenna is used because the hollow antenna elements will "fold" if too much force is applied to them.
These units are in Like New Condition.. Sold AS-IS but will not be DOA.   Have access to more...ASK!