The $5 stuff from McMaster is 1/8" wall and is really flimsy. You don't want to use that. The lined stuff is much cheaper and more durable. You want SAE30R9 rated hose. It it viton lined. Greaseworks sells this hose in bulk, and often you can find it in your local parts house. Just make sure it is SAE30R9 and you'll be fine.

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