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0.125% (1250 ppm)Ch4/Air [2.5% LEL] Calibration Gas in a 103 Liter Disposable Steel Cylinder, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA
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2.5% LEL NOT 50% LEL
0.125% (1250 ppm)Ch4/Air [2.5% LEL] Calibration Gas in a 103 Liter Disposable Steel Cylinder, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA