Loading... Please wait...MSA 10058172 Equivalent by GASCO, 60 CO, 2.5% Methane (50% LEL), 15% O2, 10 PPM NO2 contained in a 34 Liter Disposable Aluminum Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA