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ASTM D525, ASTM D873, ASTM D942, ASTM D4539, ASTM D5304, ASTM D6468, ASTM D7501, Octel F31, duPont F21,
4″ Vacuum gauge, 1% F.S. accuracy, each. This Ashcroft vacuum gauge works for D2274. Method requires 80 kPa