Calibration Gas, CGA Number CGA 600, Container Type Cylinder, Cylinder Capacity 34 L, Cylinder Diameter 3 in, Cylinder Height 10.75 in, For Use With Multi-Gas Monitors, Gas Mixture Hydrogen 200 ppm, Gas Type Hydrogen, Product Type Calibration Gas, Accuracy +/-2 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Type 600, Operating Pressure - Maximum 500 psi