Alex, I ship them through Australia Post and on the docket it says EMS International Courier.
There are two options for air freight 6-10 working days or 3-5 working days.
I used the 3-5 working days for these as Carlos is in a hurry, the weight of these gears was 6.86kg and cost $140 Oz for this service. The longer option was about $30 less.
In comparison the 2.85 gears weigh about 3.2kg.
These 3.15's are big, equivalent to a Nissan Patrol or Landcruiser sized t/case gears.


I just luv my "clacker Jabber".................