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416-15 Mixture

GASCO Precision Calibration Gas Mixture 200 PPM Carbon Monoxide, 20 PPM Hydrogen Sulfide, 2.5% Methane (50% LEL), 15% Oxygen, Balance Nitrogen Contained, For Use with Any and All Gas Detectors, Calibration Certificate NIST, Made in the USA

GASCO Calibration Gas is ISO 9001 Certified.