GN-04
This is a very handy adapter that can be used for inflating vehicle tires, bike tires, and anything with a standard valve stem. Simply connect the male end into a standard low pressure BCD or Drysuit hose, turn on your scuba tank, and inflate.
I know of many off road buddies that will carry a standard scuba tank and an old regulator with the Air Fill Adapter for emergency air fills while traveling.