A very popular mid size antenna.
This is very similar to the old Avanti Moonraker (remember them from the 70's?).
Good quality, good performance, and good value for money.
Available as a SO239 fitting antenna only, or complete with matching Sirio mag mount.
The mag mount supplied is the genuine Sirio one - this is enclosed in plastic (stops it rusting) and comes complete with a rubber boot (helps stop it scratching).
This antenna is a SO239 mount not 3/8 thread.