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  1. wsfarrell Jun 22, 2016

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    I have 4 of these o-rings that I won't be using. I hoped they would fit on some vintage Tekna regulators I'm restoring, but they're a couple microns too big. So, I'll send 2 each to the first 2 responders. Please ask for these only if you currently have a Speedmaster on a JB Champion and would like to minimize abrasion. Thanks--------