BF4-SG-25Z Sightglass Flanges

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OPW Engineered Systems Liquip BF4-SG-25Z Sightglass Flange is a 4" (100mm) Truck Trailer Manufacturers Association (TTMA) approved sight glass flange that fits behind an API adaptor and Liquip butterfly valve to show the presence of product and its color to confirm accurate product identification.