Product Description
Calgaz 304 Mix, Carbon Monoxide 100 PPM, Methane 50% LEL [2.5% Methane by volume], Balance Air [20.9% oxygen in Nitrogen] contained in a 552 Liter Disposable Steel Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection: CGA 590, Calibration Certificate NIST, Made in the USA