GASCO Custom Mixture 5000 ppm Hydrogen (H2), 5000 ppm Ethylene (C2H4), 5000 ppm Carbon Monoxide (CO), 5000 ppm Carbon Dioxide (CO2), 5000 ppm Ethane, Balance Nitrogen 34 Liter C-10
For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA