MSA Calibration Cylinder, Gas, 34 L, (CH4) 1.45%, (O2) 15%, (CO) 60 PPM, (H2S) 20 PPM, Aluminum Sampler Suitable for certification and as Suitable for certification and as such serve as primary reference standards in many government and private laboratories Accessories 4 gas mix Gas Mixture CO NON FLAMMABLE GAS Select Cylinder Size
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