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Old Jun 30, 2011, 03:41 PM
aeajr is offline
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LI, New York, USA
Joined Mar 2003
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I agree, but the typical for this kind of tubing is 1/16" walls. so, your 5/16" OD has an ID or 3/16. the OD of 3/8 is 1/4" and so on.

the list is a general guideline, not a rigerous assessment.
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