Mahlkonig K30 Vario Air - Single Espresso GrinderMahlkonig K30 Vario Air Single Espresso Grinder Building off the success of the K30 Vario, the official grinder of the United States and World Barista Championships, Mahlkonig has refined their product even further with the K30 Air. Featuring the same high precision 65 mm flat burrs, stepless grind adjustment, doserless design, and programmable timed dosing, Mahlkonig's K30 Air delivers the same high quality experience you would expect from a Vario.