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500 PPM Carbon Monoxide, 5000 PPM Carbon Dioxide, 2.5% (50% LEL) Methane, 20.9% Oxygen (Air), Balance Nitrogen - 221 Liter Steel
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Personal Gas Monitor A4 For Carbon Monoxide 0-500 ppm CO-01 Carbon Monoxide With Alkaline Batteries & Belt Clip Model 72-0044RK-03 custom - Accurate Specialty Gas Equipment
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