Craig Lwrote a review of Yakima 1A HiRise Spacers - Set of 4 on September 11, 2017
Familiarity: I've put it through the wringer
I also used these on my vanagon to get some space under the crossbars. They work perfectly. Only gripe is that you need boltcutters / hacksaw to get them installed on the normal mounts. Little bit of a PITA.