Calibration Gas, CGA Number CGA 600, Container Type Cylinder, Cylinder Capacity 17 L, Cylinder Diameter 3 in, Cylinder Height 10.75 in, For Use With Multi-Gas Monitors, Gas Mixture Propane (25 Percent LEL) 0.35 Percent, Gas Type Pentane, Product Type Calibration Gas, Accuracy +/-2 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Type 600, Operating Pressure – Maximum 240 psi