58L-435-19 | X05NI79CP5811S8 | Carbon Monoxide 100 PPM, Methane 30% LEL, Hydrogen Sulfide 25 PPM, 19% Oxygen, Balance Nitrogen contained in a 58L Liter Disposable Aluminum Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA SDS#012738