So these are the perfect replacement for the polaris 380 or Goby380. You will need to keep the nuts to use on these as these are the swivels only. Took off the cracked one popped this on and whammy. Perfect. No leaks and no issues with it not spinning. I checked all three out of the package to see if they turn and they all do. Works perfectly as described and an excellent value for the money.
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