A very popular complete mag mount 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.
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.