01-31-2014, 11:38 AM
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Senior CC Premier Member
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Join Date: Nov 2004
Location: SoCal,
CA
Cobra Make, Engine: CSX #4xxx with CSX 482; David Kee Toploader
Posts: 3,574
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Not Ranked
If you want to be absolutely sure on diameter, I found these PI Tapes years ago and use them all the time. I have a 2"-12" and a 12"-24". I was surprised how much I use them for various projects! They have many other pretty cool measuring devices as well. Used in aerospace a lot. 
Products & Technical Info - Pi Tape Corporation manufactures outside and inside diameter tapes, linear rule, Go/No-Go tapes, and custom specialty tapes for measuring O-rings and inside diameters of other soft-walled parts. In addition, Pi Tape Corpor
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All that's stopping you now Son, is blind-raging fear.......
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