The Grainger Calibration Gas 116L 3-Gas Mix is a 116 liter cylinder of calibration gas used for gas detector calibration and bump testing. It contains a precise mixture of 3 gases: 25% LEL Methane, 18% Oxygen, and 60 ppm Carbon Monoxide. This disposable cylinder has a CGA-580 outlet connection and comes equipped with a handwheel valve and protective cap. The shelf life is 18 months from the date of manufacture. This calibration gas is suitable for calibrating and bump testing many different gas detectors including combustible gas, O2 deficiency, and CO sensors.