Aluminum tubing used in Maco® antennas.
All Tubing is Aircraft Grade 6063-T5 Hard Extruded Aluminum Tubing (Unless Otherwise Noted)
Unprocessed tubing is plain aluminum tubing.
Swaged tubing is compressed to create a connecting joint.
Slotted tubing has been cut to allow tubing to be tightened down with a clamp when another piece is slid inside.
Flattened and pierced tubing has been flattened on one end and has had a hole punched through to allow wire to be connected.
Find parts list for each antenna here: http://macoantennas.net/AssemblyInstructions.html