EMT Conduit Antenna Mast
Another good source of antenna masts is readily available EMT Conduit from your neighborhood building supply outlet.
In this video, Darren (N4VFR) shows us how he mounted a 2m/440cm J-Pole Antenna on a few lengths of EMT Conduit.
If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=vSHr8k07PdQ.
Here are a few comments from Darren (N4VFR):