My 2004 Dolphin had the metal antenna that got caught in the Dish Satellite operation once in a while, made the RV taller when pullin into gas stations and I didn't like the look of it.
Went to the local auto parts store and bought two of the rubber ducky type of antenna's. The reason why I bought two was the point where the antenna mounted to the base on the roof, the screw that held the antenna on was either from the antenna ball or from the roof mount ball. one of them worked and fit right in. I was able to see this before I opened the antenna package. Returned the other antenna the next time I drove by the auto parts store, didn't need to do a special trip.
Ed & Jan, USMC Ret. 67-87, Vista, Ca.
'04 Dolphin LX Heritage, '2019 Frontier tow
Ham Radio, USCGAux(comms)