If I could butt in for some quick help, could someone with good knowledge on the subject could search CONCOA GAS REGULATOR -- 400 SERIES- - 200 PSI- - 4000 PSI on a popular e-bidding website and tell me if that's dual stage or not it would be highly appreciated. It looks it, but some of the 400 series is and isn't, so I can't be sure.
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