Hey guys - I ordered some "official nautique" sending units this week for the ballast system. They arrived and that they're actually "KUS" brand which are available on Amazon and a lot of other places for a few bucks cheaper. All you need to know is the length. I am guessing that the fuel sender is KUS as well. I mention this not only for the slight cost savings but also for the convenience if you're in a pinch and can't get them from a Nautique dealer in your timeframe (which for me is always compressed because everyone wants to ride on the boat, not watch me fix it!).