Photo provided by a Kona Adapter owner using a 16mm valve.

The inside diameter of the standard High Volume Evacuation (HVE) valve in the United States (and many other countries) is 11mm.  The  inside diameter of some European style HVE valves is 16mm.    The Kona Adapter is designed to fit 11mm HVE valves.  To connect the Kona Adapter to your 16mm valve you will need a 16mm to 11mm adapter.  These adapters are readily available in many places.

Here are a few links I found via google:

http://www.pearsondental.com/catalog/product.asp?majcatid=18&catid=4663&subcatid=13075&pid=53001&dpt=0

http://shop.bfmulholland.com/Catalogue/Disposables/Aspirator-Tips-Ejectors/SteriBlue-Blue-Adapter-11mm16mm-O-SB-ADAPTDBLE-SE021

http://www.clickdental.com/Consumables/Aspirator-Tips-and-Tubes/Double-Adaptor-11-16mm/lid/4420

Photos