Go a few sets of Barrow Twin Seal hard line fittings. They come with 2 spare O rings which is nice.. however i wonder, are both O-rings spares in case the inside gets shredded, or is one o-ring meant to fit under the collar, and the other as a spare?
![TPnUCnw.jpeg](https://i.imgur.com/TPnUCnw.jpeg)
![Z7NfPzK.jpeg](https://i.imgur.com/Z7NfPzK.jpeg)
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