3m Airbrush Airline - AA 222 Airline
This airline is suitable for all Iwata Airbrushes and also the AA 186 & AA 180 airbrushes.
They have now arrived and are Red airline. 
If you have a compressor that is not iwata, it suits most connections, but if not you can buy from many hardware stores the connector from this airline to your own compressor.
You will require this airline if buying any Iwata airbrush.