Borrow a 2 5/16" ball (it is stamped on the top) and see if it fits in the trailer--if not, you need a 2"--get the biggest shaft you can no matter which ball size you need.
Chrome/zinc--doesn't matter, get the cheaper one. Chrome is pretty, but it is always covered up, right? And lube it a little every now and then, and keep it free of dirt buildup--the lube will attract dirt.
Joe
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'16 40QBH Phaeton
'21 Sahara HA toad
'15 38RSSA Mobile Suites--traded
'05 36TK3 Mobile Suites--retired but not forgotten
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