This 11-section multi-purpose aluminum telescopic pole can be used for vertical antennas or as a mast. Great for portable, temporary use and permanent use -- traveling, camping, etc. Includes one size of each slitted tube listed above and ten hose clamps. MFJ-1965 is 64 feet fully extended and 6 feet collapsed without clamps. Guying is required if mast is extended beyond 30 feet. Top section is .625 OD. Bottom section is 2 inches OD x .120 wall.