Sorry but I don't know what size hitch ball for the 2503s. You might try posting your question in the Rockwood forum. It would be a good way to meet some Rockwood owners and find out more about the unit you are interested in.
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Great choice for "Living within my means" and camping for one...
Formerly owned 2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
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