I was wondering if these are for the same size as their HI-flow clunks?
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Hi Keith,
Sorry no, I used the standard Tygon size and it fits so the HiFlow will likely leak... But these are nice fittings and haven't leaked in a dozen flights so far over a couple months.
Len

A buddy of mine has them for his jets for the over flow tanks. He goes to the pilot station to prepare to fly, while I stay at the jet to remove the over flow tank prior to the flight. They are hard to unplug, and I have even pulled the hose off of the male nipple into the fuselage's female nipple.