Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 722-500-580-B-1 - 722500580B1 4 Pack Rack What is the difference between

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Harris Two Stage Ultra High Purity Brass Barstock Regulator Model 722-500-580-B-1 - 722500580B1 4 Pack Rack What is the difference betweenHarris Two Stage Ultra High Purity Brass Barstock Regulator Model 722 500 580 B 1 722500580B1 Model HP722 is a Two Stage Cylinder Regulator in Brass Barstock for constant delivery pressure from full to near empty Cylinder conditions. The Model HP722 is suitable for High Purity gas applications, research sample systems gases, process analyzer gases, gas chromatography, EPA protocol gases, laser gas systems and emission monitoring systems. Features 1 11